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1: <html> 2: <head> 3: <meta name=Title content="Session Two: Apache Handlers (loncapa_apache"> 4: <meta http-equiv=Content-Type content="text/html; charset=macintosh"> 5: <title>Session Two: Apache Handlers (loncapa_apache</title> 6: <style> 12: </style> 13: </head> 14: <body bgcolor=#FFFFFF class="Normal" lang=EN-US> 15: <div class=Section1> 16: <h2>Session Two: Apache Handlers (loncapa_apache.conf), Authentication and Access 17: Control, Session Environment (Matthew)</h2> 18: <h3><a name="_Toc470397993"></a><a name="_Toc514840845"></a><a 19: name="_Toc421867046">Server Content Resource Areas</a></h3> 20: Internally, all resources are identified primarily by their URL.  Different 21: logical areas of the server are distinguished by the beginning part of the 22: URL: 23: <ul type=disc> 24: <li>/adm: publicly available content, 26: logos, manual pages, etc.</li> 27: </ul> 28: <ul type=disc> 29: <li>/res/domainname/authorname/..: the resource area, holding 33: course maps, HTML pages, homework, movies, applets, etc. Access to these 34: files is restricted by the cookie-based authentication mechanism. Content 35: in this area will be served by type-dependent handlers, for example, one 36: handlers to serve homework problems, and another one for TeX resources. 37: The structure of this area of the server is exactly the same on every server, 38: even though not all resources might be present everywhere.</li> 39: </ul> 40: <ul type=disc> 41: <li>/raw/domainname/authorname/..: internally, this is just a 45: symbolic link to the res 46: directory, however, no content handlers are called when serving a resource 47: and access is controlled by IP rather than cookies. This structure is used 48: for replication of resources between servers.</li> 49: </ul> 50: <ul type=disc> 51: <li>/~authorname/.., /priv/authorname: the content construction space. This is normal UNIX filespace, 56: which however can only by viewed on the web by the authors themselves through 57: the cookie based authentication. Content handlers are active for this space. 58: This space can be mounted on other UNIX machines, as well as AppleShare 59: and Windows. Below the authorname, 60: this directory has the same structure as the resource space of the author.</li> 61: </ul> 62: <ul type=disc> 63: <li>/lon-status/..: LON-CAPA status 65: information � behind basic http authentication so it is not dependent on 66: system functions</li> 67: </ul> 68: Authors can only write-access the /~authorname/ space. They can copy resources into 72: the resource area through the publication step, and move them back through 73: a retrieve step. Authors do not have direct write-access to their resource 74: space. 75: <h3><a name="_Toc514840846"></a><a name="_Toc421867047">Apache Request Cycle 76: and Handlers</a></h3> 77: The standard mode in which the Apache web server is used is that a URL corresponds 78: to some static file on the file system, which then more or less gets sent 79: out as-is. Slight deviations from that simple principle are however already 80: the directory listing function, virtual servers, and the cgi-bin directory. 81: In the latter case, Apache executes the file in a new process and provides 82: both the input to the process in the environment, and routes the output to 83: the client. Other deviations are the error messages. 84: In a more general view, URLs to Apache are URIs (Uniform Resource Identifiers), 85: which may are may not correspond to a physical file, which in turn may or 86: may not be sent out as-is. 87: As a request for a URI gets sent to the Apache server, it goes through several 88: phases. At each phase (�stage�) along the process, handler modules can be 89: defined to deal with the request. Details about these phases are given in 90: the Eagle book Chapter 3 (page 60). 91: These handler modules are not like cgi-scripts executed in a separate process, 92: but are dynamically linked into the Apache child processes themselves � they 93: run inside of Apache. The mod_perl mechanism in addition links the Perl interpreter 94: into the Apache child process. Modules are pre-interpreted (�compiled�) by 95: the Perl interpreter when they are first loaded, and the pre-interpreted code 96: stays permanently in the memory allocated to that Apache child process. The 97: result is a significant speed-up, and through the flexible mechanism of module 98: registration and different stages of the process, a high degree of customizability. 99: LON-CAPA does not use Apache::Registry, and so in addition avoids the unnecessary 100: overhead of emulating a cgi-environment within the handlers. Instead, it makes 101: direct use of the Apache Perl API (Chapter 9, Eagle book).  102: <h3><a name="_Toc514840847"></a><a name="_Toc421867048">Handler Definition</a></h3> 103: Which chain of handler deals with which kind of resource is defined in /etc/httdp/conf/loncapa_apache.conf. 104: LON-CAPA only defines handlers at the (in order) header-parser, access control, 105: and response phase (figure 3-3 Eagle book). In the header-parser phase, the 106: replication handler is run, and in the access-control phase, the various access-handlers. 107: Future handlers will mostly be implemented in the response phase. Fig. 108: 1.2.2 shows excerpts of the configuration 109: script /etc/httpd/loncapa_apache.conf 110: for these modules. 111: <div style='border:solid windowtext .5pt;padding:31.0pt 31.0pt 31.0pt 31.0pt'> 112: # ------------------------------------------------------------- 114: Access Handlers 115: <LocationMatch "^/res.*"> 117: PerlAccessHandler       119: Apache::lonacc 120: PerlHeaderParserHandler Apache::lonrep 122: ErrorDocument     124: 403 /adm/login 125: ErrorDocument     127: 404 /adm/notfound.html 128: ErrorDocument     130: 406 /adm/roles 131: ErrorDocument     133: 500 /adm/errorhandler 134: </LocationMatch> 136: <LocationMatch "^/priv.*"> 138: PerlAccessHandler Apache::loncacc 140: SetHandler        142: perl-script 143: PerlHandler       145: Apache::lonconstruct 146: ErrorDocument     148: 403 /adm/login 149: ErrorDocument     151: 404 /adm/notfound.html 152: ErrorDocument     154: 406 /adm/unauthorized.html 155: ErrorDocument     157: 500 /adm/errorhandler 158: </LocationMatch> 160: <LocationMatch "^/raw.*"> 162: PerlAccessHandler Apache::lonracc 164: </LocationMatch> 166: <LocationMatch "^/\~.*"> 168: PerlAccessHandler Apache::loncacc 170: ErrorDocument     172: 403 /adm/login 173: ErrorDocument     175: 404 /adm/notfound.html 176: ErrorDocument     178: 406 /adm/unauthorized.html 179: ErrorDocument     181: 500 /adm/errorhandler 182: AllowOverride None 184: </LocationMatch> 186: � 189: # --------------------------------------------- 191: Resource Space Content Handlers 192: <LocationMatch "^/res/.*/$"> 194: SetHandler perl-script 196: PerlHandler Apache::lonindexer 198: </LocationMatch> 200: <LocationMatch "^/res/.*\.tex$"> 202: SetHandler perl-script 204: PerlHandler Apache::lontex 206: </LocationMatch> 208: <LocationMatch "^/res/.*\.page$> 210: SetHandler perl-script 212: PerlHandler Apache::lonpage 214: </LocationMatch> 216: � 218: <LocationMatch "^/(res|\~).*\.(xml|html|htm|xhtml|xhtm)$"> 220: SetHandler perl-script 222: PerlHandler Apache::lonxml 224: </LocationMatch> 226: <LocationMatch "^/(res|\~).*\.(problem|exam|quiz|assess|survey|form)$"> 228: SetHandler perl-script 230: PerlHandler Apache::lonhomework 232: </LocationMatch> 234: # -------------------------------------------------------------- 236: Admin Programs 237: <Location /adm/roles> 239: PerlAccessHandler       241: Apache::lonacc 242: SetHandler perl-script 244: PerlHandler Apache::lonroles 246: ErrorDocument     248: 403 /adm/login 249: ErrorDocument     251: 500 /adm/errorhandler 252: </Location> 254: <Location /adm/login> 256: SetHandler perl-script 258: PerlHandler Apache::lonlogin 260: </Location> 262: � 264: <Location /adm/annotations> 266: PerlAccessHandler       268: Apache::lonacc 269: SetHandler perl-script 271: PerlHandler Apache::admannotations 273: ErrorDocument     275: 403 /adm/login 276: ErrorDocument     278: 500 /adm/errorhandler 279: </Location> 281: � etc � 283: </div> 284: Fig. 1.2.2 � Excerpts of loncapa_apache.conf 287: <h3><a name="_Toc514840849"></a><a name="_Toc421867049">Authentication Overview</a></h3> 288: A user can log into any server in the network and run sessions. The server 289: responsible for initially authenticating the user is the user�s homeserver. 290: When a user first accesses a server within a browser session, he or she is 291: challenged to provide authentication information in the form of username, 292: password and domain � this is done by lonlogin, which is the error_document 294: for lonacc and loncacc (the normal authentication handlers). 296: When the server receives that information, it asks all library servers in 297: the domain that the user specified to validate the information � this is done 298: by lonauth. 299: The user�s home server will answer with authorized or non_authorized, all others with unknown_user. If one server authorizes 303: the user, a cookie is returned to the user by lonauth 304: and the session is initialized on the local server by establishing the session 305: environment file. If a server sends non_authorized, the user is rejected.  Fig. 307: 1.3.1 illustrates this process. 309: </div> 310: 312: <div class=Section2> 313: <div class=Section3> 314: <div style='border:solid windowtext .5pt;padding:1.0pt 4.0pt 1.0pt 4.0pt'> 315: Domain 316: � 317: username, password � Library 318: Server 319: | � 320: unknown_user � 321: | 322: | � 323: username, password � Library 324: Server 325: | � 326: authorized � 327: | 328: User � 330: username,password,domain � 331: Server 332: � cookie � 335: store session information for valid 336: cookies 337: </div> 338: Fig. 1.3.1 � Illustration of Authentication Mechanism 340: At 341: all subsequent interactions, the client sends the cookie back to the server 342: � if the cookie is missing or invalid, the user is re-challenged for login 343: information. Handlers are lonacc and loncacc. Cookies expire by closing the browser and are invalidated 347: when the user logs out or logs in a second time into the same machine from 348: another browser. 349: <h3><a name="_Toc514840850"></a><a name="_Toc421867050">Authentication Mechanisms, 350: User Data, Passwords</a></h3> 351: On the library servers, it is a routine in lond that does the authentication. It 353: checks if this is the user�s homeserver, checks the password, and answers with �unknown_user�, 355: �authorized� or �non_authorized�. 356: 357: Determination if this is the user�s homeserver is done 358: by the presence of his or her password file in 359: /home/httpd/lonUsers/domain/1.char/2.char/3.char/username/passwd 363: for example 364: /home/httpd/lonUsers/msu/s/m/i/smith/passwd 365: The password is stored in the format mechanism:info, where mechanism can currently be unix, krb4 368: or internal. For krb4, the info is the Kerberos domain, for internal it is the crypt password itself. unix simply authenticates against /etc/passwd. 374: <h3><a name="_Toc514840851"></a><a name="_Toc421867051">Environment</a></h3> 375: The access handlers � coming early in the Apache request cycle � also set 376: up the session environment. The cookie received from the web client is a 377: pointer to the session profiles, which are stored in a directory for temporary 378: files (/home/httpd/lonIDs/). 379: 380: Standard Components 382: These are the standard components of the environment added by Apache and 383: the shell. 384: AUTH_TYPE ---- 385: Basic 386: DOCUMENT_ROOT ---- 387: /home/httpd/html 388: GATEWAY_INTERFACE 389: ---- CGI-Perl/1.1 390: HTTP_ACCEPT ---- 391: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */* 392: HTTP_ACCEPT_CHARSET 393: ---- iso-8859-1,*,utf-8 394: HTTP_ACCEPT_ENCODING 395: ---- gzip 396: HTTP_ACCEPT_LANGUAGE 397: ---- en,pdf 398: HTTP_CONNECTION 399: ---- Keep-Alive 400: HTTP_COOKIE ---- 401: SITESERVER=ID=cbc6695505253a2ff0e7bb7110574d90; lonID=kortemey_990461714_msu_msul1 402: HTTP_HOST ---- 403: zaphod.lite.msu.edu 404: HTTP_REFERER ---- 405: 406: HTTP_USER_AGENT 407: ---- Mozilla/4.75 (Macintosh; U; PPC) 408: MOD_PERL ---- mod_perl/1.21 409: PATH ---- /sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bi¤ 410: QUERY_STRING ---- 411: 412: REMOTE_ADDR ---- 413: 35.8.63.7 414: REMOTE_PORT ---- 415: 1844 416: REMOTE_USER ---- 417: lonadm 418: REQUEST_METHOD 419: ---- GET 420: REQUEST_URI ---- 421: /adm/test 422: SCRIPT_FILENAME 423: ---- /home/httpd/html/adm/test 424: SCRIPT_NAME ---- 425: /adm/test 426: SERVER_ADDR ---- 427: 35.8.63.51 428: SERVER_ADMIN ---- 429: korte@lite.msu.edu 430: SERVER_NAME ---- 431: zaphod.lite.msu.edu 432: SERVER_PORT ---- 433: 80 434: SERVER_PROTOCOL 435: ---- HTTP/1.0 436: SERVER_SIGNATURE 437: ---- 438: SERVER_SOFTWARE 439: ---- Apache/1.3.9 (Unix) (Red Hat/Linux) mod_perl/1.21 440: Resource Access Control 442: The following values are set by traceroute at the initialization of the 443: course and are used by access handlers to check if a resource can be served 444: to a user. 445: acc.cond.msu_12679c3ed543a25msul1.0 446: ---- 0 447: acc.cond.msu_12679c3ed543a25msul1.1 448: ---- 0 449: acc.res.msu_12679c3ed543a25msul1. 450: ---- &:1& 451: acc.res.msu_12679c3ed543a25msul1.msu/mmp 452: ---- &welcome267.htm:1&welcomelbs267.htm:0& 453: acc.res.msu_12679c3ed543a25msul1.msu/mmp/applist/Spectrum 454: ---- &s.htm:1& 455: acc.res.msu_12679c3ed543a25msul1.msu/mmp/applist/chain 456: ---- &chain.htm:1& 457: acc.res.msu_12679c3ed543a25msul1.msu/mmp/applist/coulomb 458: ---- &orbit.htm:1& 459: acc.res.msu_12679c3ed543a25msul1.msu/mmp/applist/induct 460: ---- &faraday.htm:1& 461: acc.res.msu_12679c3ed543a25msul1.msu/mmp/conversions 462: ---- 463: &conv_area.htm:1&prefixes.htm:1&conv_power.htm:1&intro.htm:1&conv_temperature.htm:1&conv_time.htm:1&conv_velocity.htm:1&conversions.sequence:1&conv_length.htm:1&conv_mass.htm:1&conv_pressure.htm:1&conv_volume.htm:1&conv_energy.htm:1&conv_angle.htm:1&sibaseunits.htm:1& 464: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap13 465: ---- &cd371.htm:1& 466: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap16 467: ---- 468: &cd427.htm:1&cd424.htm:1&Stable.htm:1&cd421.htm:1&Constants.htm:1&cd425.htm:1&cd422.htm:1&kap16.sequence:1&cd426.htm:1&cd423.htm:1& 469: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap17 470: ---- 471: &cd436.htm:1&kap17.sequence:1&cd433.htm:1&cd430.htm:1&cd437.htm:1&cd434.htm:1&cd428.htm:1&cd431.htm:1&cd435.htm:1&cd429.htm:1&geometry.htm:1&cd432.htm:1& 472: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap17/calculus 473: ---- &calc.htm:1& 474: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap18 475: ---- 476: &RR440.htm:1&RR449b.htm:1&RR446b.htm:1&cd473.htm:1&RR453.htm:1&RR447.htm:1&RR443b.htm:1&RR449a.htm:1&RR450.htm:1&RR452a.htm:1&RR444.htm:1&RR446a.htm:1&sum18a.htm:1|1&RR441.htm:1&RR443a.htm:1&eField.htm:1&RR454.htm:1&RR444b.htm:1&RR448.htm:1&RR447app.htm:1&RR451.htm:1&RR445.htm:1&RR453a.htm:1&kap18.sequence:1&RR439.htm:1&RR447a.htm:1&RR442.htm:1&RR450a.htm:1&RR444a.htm:1&RR448b.htm:1&RR445newch.htm:1&RR4460app.htm:1&RR455.htm:1&RR441a.htm:1&RR449.htm:1&RR452.htm:1&cd438.htm:1&RR446.htm:1&RR454a.htm:1&sum18.htm:1|1&RR446c.htm:1&RR448a.htm:1&RR451a.htm:1&RR443.htm:1&RR445answer.htm:0&RR445a.htm:1& 477: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap18/demo 478: ---- 479: &vid440.htm:0&vid440sm.htm:0&vid449.htm:0&vid449-a.htm:0&vid441.htm:0&vid449sm.htm:0&vid455.htm:0&egun.htm:0&egunsm.htm:0&vid441sm.htm:0&vid449-asm.htm:0&vid455sm.htm:0& 480: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap18/problems 481: ---- 482: &cd460b.problem:1&cd458.problem:1&cd462.problem:1&cd457.problem:1&cd461.problem:1&cd460.problem:1&cd464.problem:1&cd459.problem:1&cd463.problem:1& 483: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap18a 484: ---- &kap18a.sequence:1& 485: acc.res.msu_12679c3ed543a25msul1.msu/mmp/kap18a/problems 486: ---- 487: &cd465.problem:1&cd472.problem:1&cd466.problem:1&cd467.problem:1&cd470.problem:1&cd468.problem:1&cd471.problem:1&cd469.problem:1& 488: � etc for all 489: resources in the course � 490: Browser Information 492: browser.mathml 493: ---- 494: browser.os ---- 495: mac 496: browser.type ---- 497: netscape 498: browser.version 499: ---- 4.75 500: Cached Information about Courses and their Description 502: course.msu_12679c3ed543a16msul1.description 503: ---- lbs267L Lab SS01 504: course.msu_12679c3ed543a16msul1.domain 505: ---- msu 506: course.msu_12679c3ed543a16msul1.home 507: ---- msul1 508: course.msu_12679c3ed543a16msul1.last_cache 509: ---- 990461725 510: course.msu_12679c3ed543a16msul1.num 511: ---- 12679c3ed543a16msul1 512: course.msu_12679c3ed543a16msul1.url 513: ---- msu/mmp/lbs267l.sequence 514: course.msu_12679c3ed543a25msul1.description 515: ---- lbs267 Lecture SS01 516: course.msu_12679c3ed543a25msul1.domain 517: ---- msu 518: course.msu_12679c3ed543a25msul1.home 519: ---- msul1 520: course.msu_12679c3ed543a25msul1.last_cache 521: ---- 990461728 522: course.msu_12679c3ed543a25msul1.num 523: ---- 12679c3ed543a25msul1 524: course.msu_12679c3ed543a25msul1.url 525: ---- msu/mmp/lbs267.sequence 526: course.msu_12679c3ed543a37msul1.description 527: ---- Demo Course 528: course.msu_12679c3ed543a37msul1.domain 529: ---- msu 530: course.msu_12679c3ed543a37msul1.home 531: ---- msul1 532: course.msu_12679c3ed543a37msul1.last_cache 533: ---- 990461725 534: course.msu_12679c3ed543a37msul1.num 535: ---- 12679c3ed543a37msul1 536: course.msu_12679c3ed543a37msul1.url 537: ---- msu/korte/demo.sequence 538: Information Imported from the Environment Database File of the User 540: environment.favorite.cake 541: ---- Cheese Cake 542: environment.favorite.color 543: ---- green 544: environment.firstname 545: ---- Gerd 546: environment.id 547: ---- z12345678 548: environment.lastname 549: ---- Kortemeyer 550: Information about the Request 551: httpref./res/msu/mmp/ 552: ---- /res/msu/mmp/welcome267.htm 553: request.ambiguous 554: ---- adm/pages/index.html 555: request.course.fn 556: ---- /home/httpd/perl/tmp/kortemey_msu_12679c3ed543a25msul1 557: request.course.id 558: ---- msu_12679c3ed543a25msul1 559: request.course.sec 560: ---- 561: request.course.uri 562: ---- msu/mmp/lbs267.sequence 563: request.filename 564: ---- /home/httpd/html/adm/test 565: request.host ---- 566: zaphod.lite.msu.edu 567: request.role ---- 568: cc./msu/12679c3ed543a25msul1 569: request.state ---- 570: published 571: Information about the User 573: user.domain ---- 574: msu 575: user.environment 576: ---- /home/httpd/lonIDs/kortemey_990461714_msu_msul1.id 577: user.home ---- 578: msul1 579: user.login.time 580: ---- 990461714 581: user.name ---- 582: kortemey 583: Information about User Roles and Privileges 585: user.priv.au./msu/./ 586: ---- :sma&F:gan&F 587: user.priv.au./msu/./msu/ 588: ---- :cca&IK:are&F:bre&F:cre&F:ere&F 589: user.priv.ca./msu/korte./ 590: ---- :sma&F:gan&F 591: user.priv.ca./msu/korte./msu/ 592: ---- :are&F:bre&F:cre&F:ere&F 593: user.priv.ca./msu/korte./msu/korte 594: ---- 595: user.priv.cc./msu/12679c3ed543a16msul1./ 596: ---- :sma&F:bre&F:mcr&F 597: user.priv.cc./msu/12679c3ed543a16msul1./msu/ 598: ---- 599: user.priv.cc./msu/12679c3ed543a16msul1./msu/12679c3ed543a16msul1 600: ---- :opa&F:srm&F:gan&F:are&F:ccr&IK:cep&IK:cta&IK:cre&F:cst&IK:cin&IK:ere&F:vgr&F 601: user.priv.cc./msu/12679c3ed543a25msul1./ 602: ---- :sma&F:bre&F:mcr&F 603: user.priv.cc./msu/12679c3ed543a25msul1./msu/ 604: ---- 605: user.priv.cc./msu/12679c3ed543a25msul1./msu/12679c3ed543a25msul1 606: ---- :opa&F:srm&F:gan&F:cta&IK:cep&IK:ccr&IK:are&F:cin&IK:cst&IK:cre&F:ere&F:vgr&F 607: user.priv.cc./msu/12679c3ed543a37msul1./ 608: ---- :sma&F:mcr&F:bre&F 609: user.priv.cc./msu/12679c3ed543a37msul1./msu/ 610: ---- 611: user.priv.cc./msu/12679c3ed543a37msul1./msu/12679c3ed543a37msul1 612: ---- :opa&F:srm&F:gan&F:are&F:ccr&IK:cep&IK:cta&IK:cre&F:cst&IK:cin&IK:ere&F:vgr&F 613: user.priv.cm./ 614: ---- :sma&F:mcr&F:gan&F:bre&F 615: user.priv.cm./msu/ 616: ---- :mau&F:cca&IK:cad&UIK:ccc&U:cst&UIK:cdg&UIK:are&F:cli&UIK:cta&UIK:cep&UIK:ccr&UIK:bre&F:cau&U:cre&F:cin&UIK:ere&F 617: user.priv.cm./msu/12679c3ed543a16msul1 618: ---- :opa&F:srm&F:gan&F:are&F:ccr&IK:cep&IK:cta&IK:cre&F:cst&IK:cin&IK:ere&F:vgr&F 619: user.priv.cm./msu/12679c3ed543a25msul1 620: ---- :opa&F:srm&F:gan&F:are&F:ccr&IK:cep&IK:cta&IK:cre&F:cst&IK:cin&IK:ere&F:vgr&F 621: user.priv.cm./msu/12679c3ed543a37msul1 622: ---- :opa&F:cst&IK:vgr&F:srm&F:gan&F:are&F:ccr&IK:cep&IK:cta&IK:cre&F:cin&IK:ere&F 623: user.priv.cm./msu/korte 624: ---- 625: user.priv.dc./msu/./ 626: ---- :sma&F 627: user.priv.dc./msu/./msu/ 628: ---- :mau&F:cad&UIK:ccr&UIK:cep&UIK:cta&UIK:cli&UIK:ccc&U:cau&U:cst&UIK:cin&UIK:cdg&UIK 629: user.role.au./msu/ 630: ---- 964531839.0 631: user.role.ca./msu/korte 632: ---- . 633: user.role.cc./msu/12679c3ed543a16msul1 634: ---- 964531839.0 635: user.role.cc./msu/12679c3ed543a25msul1 636: ---- 964531839.0 637: user.role.cc./msu/12679c3ed543a37msul1 638: ---- 964531839.0 639: user.role.dc./msu/ 640: ---- 964531839.0 641: <h2> </h2> 642: <h3><a name="_Toc421867052">Handler Reference: LON-CAPA and the 77 Web Perl 643: Modules</a></h3> 644: Scott Harrison, freeware volunteer, sharrison@sourceforge.net 646: LON-CAPA provides many different web services for coordinating online educational 647: interactions. Currently, these web services are made available by 77 different 648: perl modules. The invocation of these perl modules is many times due to 649: the URI format based on entries inside <tt>/etc/httpd/conf/loncapa_apache.conf</tt>. 651: Throughout this technical manual, various web perl modules are described 652: in detail. Here is a summary of all the 77 web perl modules: 653: <table border=1 cellpadding=0> 654: <tr> 655: <td class="Normal"> 656: Name/Location 657: </td> 658: <td class="Normal"> 659: Description 660: </td> 661: </tr> 662: <tr> 663: <td class="Normal"> 664: SOURCE: rat/lonwrapper.pm 665: TARGET: home/httpd/lib/perl/Apache/lonwrapper.pm 666: </td> 667: <td class="Normal"> 668: Wrapper for external and binary files as standalone resources. Edit 669: handler for rat maps; TeX content handler. 670: </td> 671: </tr> 672: <tr> 673: <td class="Normal"> 674: SOURCE: loncom/publisher/loncfile.pm 675: TARGET: home/httpd/lib/perl/Apache/loncfile.pm 676: </td> 677: <td class="Normal"> 678: Provides web-based functionality for file copy, rename, mkdir, etc, 679: in the construction space menu. 680: </td> 681: </tr> 682: <tr> 683: <td class="Normal"> 684: SOURCE: loncom/interface/lonstatistics.pm 685: TARGET: home/httpd/lib/perl/Apache/lonstatistics.pm 686: </td> 687: <td class="Normal"> 688: Handler to show statistics on solving LON-CAPA problems. 689: </td> 690: </tr> 691: <tr> 692: <td class="Normal"> 693: SOURCE: loncom/publisher/londiff.pm 694: TARGET: home/httpd/lib/perl/Apache/londiff.pm 695: </td> 696: <td class="Normal"> 697: Handler to show difference between two files. 698: </td> 699: </tr> 700: <tr> 701: <td class="Normal"> 702: SOURCE: loncom/publisher/lonupload.pm 703: TARGET: home/httpd/lib/perl/Apache/lonupload.pm 704: </td> 705: <td class="Normal"> 706: Handler to upload files through browser into construction space. 707: </td> 708: </tr> 709: <tr> 710: <td class="Normal"> 711: SOURCE: loncom/homework/essayresponse.pm 712: TARGET: home/httpd/lib/perl/Apache/essayresponse.pm 713: </td> 714: <td class="Normal"> 715: Handler to evaluate essay (ungraded) style responses. 716: </td> 717: </tr> 718: <tr> 719: <td class="Normal"> 720: SOURCE: loncom/homework/externalresponse.pm 721: TARGET: home/httpd/lib/perl/Apache/externalresponse.pm 722: </td> 723: <td class="Normal"> 724: Handler to evaluate externally graded responses. 725: </td> 726: </tr> 727: <tr> 728: <td class="Normal"> 729: SOURCE: loncom/homework/loncapagrade.pm 730: TARGET: home/httpd/lib/perl/Apache/loncapagrade.pm 731: </td> 732: <td class="Normal"> 733: Handler to evaluate externally graded responses. 734: </td> 735: </tr> 736: <tr> 737: <td class="Normal"> 738: SOURCE: loncom/publisher/lonpubdir.pm 739: TARGET: home/httpd/lib/perl/Apache/lonpubdir.pm 740: </td> 741: <td class="Normal"> 742: Handler to publish directories. 743: </td> 744: </tr> 745: <tr> 746: <td class="Normal"> 747: SOURCE: loncom/publisher/lonretrieve.pm 748: TARGET: home/httpd/lib/perl/Apache/lonretrieve.pm 749: </td> 750: <td class="Normal"> 751: Handler to retrieve old versions from resource space. 752: </td> 753: </tr> 754: <tr> 755: <td class="Normal"> 756: SOURCE: loncom/homework/edit.pm 757: TARGET: home/httpd/lib/perl/Apache/edit.pm 758: </td> 759: <td class="Normal"> 760: Helper functions when in homework edit mode. 761: </td> 762: </tr> 763: <tr> 764: <td class="Normal"> 765: SOURCE: loncom/interface/lonmeta.pm 766: TARGET: home/httpd/lib/perl/Apache/lonmeta.pm 767: </td> 768: <td class="Normal"> 769: Metadata display handler. 770: </td> 771: </tr> 772: <tr> 773: <td class="Normal"> 774: SOURCE: rat/lonambiguous.pm 775: TARGET: home/httpd/lib/perl/Apache/lonambiguous.pm 776: </td> 777: <td class="Normal"> 778: Handler to resolve ambiguous file locations. 779: </td> 780: </tr> 781: <tr> 782: <td class="Normal"> 783: SOURCE: rat/lonratparms.pm 784: TARGET: home/httpd/lib/perl/Apache/lonratparms.pm 785: </td> 786: <td class="Normal"> 787: Handler to set resource parameters inside of the RAT based on metadata. 788: </td> 789: </tr> 790: <tr> 791: <td class="Normal"> 792: SOURCE: rat/lonsequence.pm 793: TARGET: home/httpd/lib/perl/Apache/lonsequence.pm 794: </td> 795: <td class="Normal"> 796: Handler for showing sequence objects of educational resources. 797: </td> 798: </tr> 799: <tr> 800: <td class="Normal"> 801: SOURCE: loncom/interface/loncreatecourse.pm 802: TARGET: home/httpd/lib/perl/Apache/loncreatecourse.pm 803: </td> 804: <td class="Normal"> 805: Allows domain coordinators to create new courses and assign course 806: coordinators. 807: </td> 808: </tr> 809: <tr> 810: <td class="Normal"> 811: SOURCE: loncom/interface/loncreateuser.pm 812: TARGET: home/httpd/lib/perl/Apache/loncreateuser.pm 813: </td> 814: <td class="Normal"> 815: Allows users to within their own privileges create/edit users and 816: give them roles. 817: </td> 818: </tr> 819: <tr> 820: <td class="Normal"> 821: SOURCE: loncom/interface/lonchart.pm 822: TARGET: home/httpd/lib/perl/Apache/lonchart.pm 823: </td> 824: <td class="Normal"> 825: Produces simple LectureOnline-like student assessment performance 826: chart 827: </td> 828: </tr> 829: <tr> 830: <td class="Normal"> 831: SOURCE: loncom/interface/loncommon.pm 832: TARGET: home/httpd/lib/perl/Apache/loncommon.pm 833: </td> 834: <td class="Normal"> 835: Makes a table out of the previous attempts. Inputs result_from_symbread, 836: user, domain, home_server, course_id. 837: </td> 838: </tr> 839: <tr> 840: <td class="Normal"> 841: SOURCE: loncom/homework/grades.pm 842: TARGET: home/httpd/lib/perl/Apache/grades.pm 843: </td> 844: <td class="Normal"> 845: Handles the viewing of grades. 846: </td> 847: </tr> 848: <tr> 849: <td class="Normal"> 850: SOURCE: loncom/homework/imageresponse.pm 851: TARGET: home/httpd/lib/perl/Apache/imageresponse.pm 852: </td> 853: <td class="Normal"> 854: Coordinates the response to clicking an image. 855: </td> 856: </tr> 857: <tr> 858: <td class="Normal"> 859: SOURCE: loncom/homework/optionresponse.pm 860: TARGET: home/httpd/lib/perl/Apache/optionresponse.pm 861: </td> 862: <td class="Normal"> 863: Handles tags associated with showing a list of options. 864: </td> 865: </tr> 866: <tr> 867: <td class="Normal"> 868: SOURCE: loncom/homework/outputtags.pm 869: TARGET: home/httpd/lib/perl/Apache/outputtags.pm 870: </td> 871: <td class="Normal"> 872: Handles tags associated with output. Seems to relate to due dates 873: of the assignment. 874: </td> 875: </tr> 876: <tr> 877: <td class="Normal"> 878: SOURCE: loncom/interface/lontest.pm 879: TARGET: home/httpd/lib/perl/Apache/lontest.pm 880: </td> 881: <td class="Normal"> 882: Used for debugging and testing the LON-CAPA system. 883: </td> 884: </tr> 885: <tr> 886: <td class="Normal"> 887: SOURCE: loncom/homework/radiobuttonresponse.pm 888: TARGET: home/httpd/lib/perl/Apache/radiobuttonresponse.pm 889: </td> 890: <td class="Normal"> 891: Handles multiple-choice style responses. 892: </td> 893: </tr> 894: <tr> 895: <td class="Normal"> 896: SOURCE: loncom/interface/lonassignments.pm 897: TARGET: home/httpd/lib/perl/Apache/lonassignments.pm 898: </td> 899: <td class="Normal"> 900: Handles processing of assignments. 901: </td> 902: </tr> 903: <tr> 904: <td class="Normal"> 905: SOURCE: loncom/interface/loncommunicate.pm 906: TARGET: home/httpd/lib/perl/Apache/loncommunicate.pm 907: </td> 908: <td class="Normal"> 909: Will be the access handler to email sending, as well as the planned 910: chatrooms, etc. 911: </td> 912: </tr> 913: <tr> 914: <td class="Normal"> 915: SOURCE: loncom/interface/lonerrorhandler.pm 916: TARGET: home/httpd/lib/perl/Apache/lonerrorhandler.pm 917: </td> 918: <td class="Normal"> 919: Handles errors. 920: </td> 921: </tr> 922: <tr> 923: <td class="Normal"> 924: SOURCE: loncom/interface/lonevaluate.pm 925: TARGET: home/httpd/lib/perl/Apache/lonevaluate.pm 926: </td> 927: <td class="Normal"> 928: Handles evaluation. 929: </td> 930: </tr> 931: <tr> 932: <td class="Normal"> 933: SOURCE: loncom/interface/lonfeedback.pm 934: TARGET: home/httpd/lib/perl/Apache/lonfeedback.pm 935: </td> 936: <td class="Normal"> 937: Handles feedback from students to instructors and system administrators. 938: Provides a screenshot of the current resource, as well as previous 939: attempts if the resource was a homework. Used by lonmsg.pm. 940: </td> 941: </tr> 942: <tr> 943: <td class="Normal"> 944: SOURCE: loncom/interface/lonnavmaps.pm 945: TARGET: home/httpd/lib/perl/Apache/lonnavmaps.pm 946: </td> 947: <td class="Normal"> 948: Handles navigational maps. 949: </td> 950: </tr> 951: <tr> 952: <td class="Normal"> 953: SOURCE: loncom/interface/lonpreferences.pm 954: TARGET: home/httpd/lib/perl/Apache/lonpreferences.pm 955: </td> 956: <td class="Normal"> 957: Handles user preferences associated with customizing the online LON-CAPA 958: educational environment. 959: </td> 960: </tr> 961: <tr> 962: <td class="Normal"> 963: SOURCE: loncom/interface/lonprintout.pm 964: TARGET: home/httpd/lib/perl/Apache/lonprintout.pm 965: </td> 966: <td class="Normal"> 967: Handles the production of printable files and resources. 968: </td> 969: </tr> 970: <tr> 971: <td class="Normal"> 972: SOURCE: loncom/interface/lonsearchcat.pm 973: TARGET: home/httpd/lib/perl/Apache/lonsearchcat.pm 974: </td> 975: <td class="Normal"> 976: Handles a searchable catalogue. 977: </td> 978: </tr> 979: <tr> 980: <td class="Normal"> 981: SOURCE: loncom/interface/londropadd.pm 982: TARGET: home/httpd/lib/perl/Apache/londropadd.pm 983: </td> 984: <td class="Normal"> 985: Allows course coordinators to upload courselists in different formats, 986: and automatically create users (if they do not exist already), assign 987: them the role of student in a course, and add them to the classlist. 988: </td> 989: </tr> 990: <tr> 991: <td class="Normal"> 992: SOURCE: loncom/interface/lonmsg.pm 993: TARGET: home/httpd/lib/perl/Apache/lonmsg.pm 994: </td> 995: <td class="Normal"> 996: lonmsg.pm has several functions to send and receive internal messages. 997: author_res_msg - send message to resource author. user_crit_msg - 998: send a critical message to a user. A critical message will require 999: acknowledgment by the recipient and the sender will be notified. user_crit_received 1000: - routine to trigger acknowledgment. statuschange - change the status 1001: of a message (read, replied, forwarded, etc). The handler also displays 1002: messages, has routines to reply, etc. 1003: </td> 1004: </tr> 1005: <tr> 1006: <td class="Normal"> 1007: SOURCE: loncom/homework/hint.pm 1008: TARGET: home/httpd/lib/perl/Apache/hint.pm 1009: </td> 1010: <td class="Normal"> 1011: This handler coordinates the delivery of hints to students working 1012: on LON-CAPA problems and assignments. 1013: </td> 1014: </tr> 1015: <tr> 1016: <td class="Normal"> 1017: SOURCE: loncom/interface/lonspreadsheet.pm 1018: TARGET: home/httpd/lib/perl/Apache/lonspreadsheet.pm 1019: </td> 1020: <td class="Normal"> 1021: Spreadsheets are completely web-based. They exist on the level of 1022: a whole course, a student, and individual assessments. 1023: </td> 1024: </tr> 1025: <tr> 1026: <td class="Normal"> 1027: SOURCE: loncom/interface/lonparmset.pm 1028: TARGET: home/httpd/lib/perl/Apache/lonparmset.pm 1029: </td> 1030: <td class="Normal"> 1031: Handler to resolve ambiguous file locations 1032: </td> 1033: </tr> 1034: <tr> 1035: <td class="Normal"> 1036: SOURCE: loncom/publisher/lonconstruct.pm 1037: TARGET: home/httpd/lib/perl/Apache/lonconstruct.pm 1038: </td> 1039: <td class="Normal"> 1040: Page wrapper for handling construction space. 1041: </td> 1042: </tr> 1043: <tr> 1044: <td class="Normal"> 1045: SOURCE: loncom/publisher/lonpublisher.pm 1046: TARGET: home/httpd/lib/perl/Apache/lonpublisher.pm 1047: </td> 1048: <td class="Normal"> 1049: Publishes an LON-CAPA educational resource complete with metadata 1050: (authorship, language, copyright, creation date, etc). 1051: </td> 1052: </tr> 1053: <tr> 1054: <td class="Normal"> 1055: SOURCE: loncom/interface/lonmenu.pm 1056: TARGET: home/httpd/lib/perl/Apache/lonmenu.pm 1057: </td> 1058: <td class="Normal"> 1059: Has routines which control the remote control. 1060: </td> 1061: </tr> 1062: <tr> 1063: <td class="Normal"> 1064: SOURCE: rat/lonpageflip.pm 1065: TARGET: home/httpd/lib/perl/Apache/lonpageflip.pm 1066: </td> 1067: <td class="Normal"> 1068: Deals with forward, backward, and other page flips. 1069: </td> 1070: </tr> 1071: <tr> 1072: <td class="Normal"> 1073: SOURCE: rat/lonratedt.pm 1074: TARGET: home/httpd/lib/perl/Apache/lonratedt.pm 1075: </td> 1076: <td class="Normal"> 1077: Builds up frame set and loads in the right thing. 1078: </td> 1079: </tr> 1080: <tr> 1081: <td class="Normal"> 1082: SOURCE: loncom/html/res/adm/pages/homeworkmenu.html 1083: TARGET: home/httpd/html/res/adm/pages/homeworkmenu.html 1084: </td> 1085: <td class="Normal"> 1086: Homework remote control. 1087: </td> 1088: </tr> 1089: <tr> 1090: <td class="Normal"> 1091: SOURCE: loncom/html/res/adm/pages/annotator/admannotations.pm 1092: TARGET: home/httpd/lib/perl/Apache/admannotations.pm 1093: </td> 1094: <td class="Normal"> 1095: This will take annotations and then plug them into a page. 1096: </td> 1097: </tr> 1098: <tr> 1099: <td class="Normal"> 1100: SOURCE: loncom/html/res/adm/pages/bookmarkmenu/admbookmarks.pm 1101: TARGET: home/httpd/lib/perl/Apache/admbookmarks.pm 1102: </td> 1103: <td class="Normal"> 1104: This will take bookmarks and get/write/display them for the LON-CAPA 1105: user interface. 1106: </td> 1107: </tr> 1108: <tr> 1109: <td class="Normal"> 1110: SOURCE: rat/lonratsrv.pm 1111: TARGET: home/httpd/lib/perl/Apache/lonratsrv.pm 1112: </td> 1113: <td class="Normal"> 1114: Handler that takes output from RAT and stores it on disk. Handles 1115: the upper hidden frame of the added window that comes up in RAT. (3 1116: frames come up in RAT server, code, and output. This module handles 1117: server connection.) 1118: </td> 1119: </tr> 1120: <tr> 1121: <td class="Normal"> 1122: SOURCE: rat/lonpage.pm 1123: TARGET: home/httpd/lib/perl/Apache/lonpage.pm 1124: </td> 1125: <td class="Normal"> 1126: bundles pages into one page 1127: </td> 1128: </tr> 1129: <tr> 1130: <td class="Normal"> 1131: SOURCE: rat/lonuserstate.pm 1132: TARGET: home/httpd/lib/perl/Apache/lonuserstate.pm 1133: </td> 1134: <td class="Normal"> 1135: compile course into binary data structure (in loncom/rat) 1136: </td> 1137: </tr> 1138: <tr> 1139: <td class="Normal"> 1140: SOURCE: loncom/xml/lontex.pm 1141: TARGET: home/httpd/lib/perl/Apache/lontex.pm 1142: </td> 1143: <td class="Normal"> 1144: Handler for tex files (somewhere in modules) 1145: </td> 1146: </tr> 1147: <tr> 1148: <td class="Normal"> 1149: SOURCE: loncom/xml/lontexconvert.pm 1150: TARGET: home/httpd/lib/perl/Apache/lontexconvert.pm 1151: </td> 1152: <td class="Normal"> 1153: Access to tth/ttm 1154: </td> 1155: </tr> 1156: <tr> 1157: <td class="Normal"> 1158: SOURCE: loncom/xml/lonxml.pm 1159: TARGET: home/httpd/lib/perl/Apache/lonxml.pm 1160: </td> 1161: <td class="Normal"> 1162: XML Parsing Module 1163: </td> 1164: </tr> 1165: <tr> 1166: <td class="Normal"> 1167: SOURCE: loncom/xml/lonplot.pm 1168: TARGET: home/httpd/lib/perl/Apache/lonplot.pm 1169: </td> 1170: <td class="Normal"> 1171: XML-based plotter of graphs 1172: </td> 1173: </tr> 1174: <tr> 1175: <td class="Normal"> 1176: SOURCE: loncom/xml/style.pm 1177: TARGET: home/httpd/lib/perl/Apache/style.pm 1178: </td> 1179: <td class="Normal"> 1180: Style Parsing Module 1181: </td> 1182: </tr> 1183: <tr> 1184: <td class="Normal"> 1185: SOURCE: loncom/xml/londefdef.pm 1186: TARGET: home/httpd/lib/perl/Apache/londefdef.pm 1187: </td> 1188: <td class="Normal"> 1189: Tags Default Definition Module 1190: </td> 1191: </tr> 1192: <tr> 1193: <td class="Normal"> 1194: SOURCE: loncom/xml/run.pm 1195: TARGET: home/httpd/lib/perl/Apache/run.pm 1196: </td> 1197: <td class="Normal"> 1198: used to prevent poorly written problems from causing lingering after 1199: effects 1200: </td> 1201: </tr> 1202: <tr> 1203: <td class="Normal"> 1204: SOURCE: loncom/xml/scripttag.pm 1205: TARGET: home/httpd/lib/perl/Apache/scripttag.pm 1206: </td> 1207: <td class="Normal"> 1208: implements <script>, <scriptlib>, <parserlib>, 1209: and <import> 1210: </td> 1211: </tr> 1212: <tr> 1213: <td class="Normal"> 1214: SOURCE: loncom/homework/randomlabel.pm 1215: TARGET: home/httpd/lib/perl/Apache/randomlabel.pm 1216: </td> 1217: <td class="Normal"> 1218: Interface for producing applet code which randomizes the labelling 1219: of an image. 1220: </td> 1221: </tr> 1222: <tr> 1223: <td class="Normal"> 1224: SOURCE: loncom/homework/lonhomework.pm 1225: TARGET: home/httpd/lib/perl/Apache/lonhomework.pm 1226: </td> 1227: <td class="Normal"> 1228: handles requests for output, evaluation, and alteration of a homework 1229: resource 1230: </td> 1231: </tr> 1232: <tr> 1233: <td class="Normal"> 1234: SOURCE: loncom/homework/inputtags.pm 1235: TARGET: home/httpd/lib/perl/Apache/inputtags.pm 1236: </td> 1237: <td class="Normal"> 1238: produces HTML input tags (<INPUT>) for rendering homework resources 1239: </td> 1240: </tr> 1241: <tr> 1242: <td class="Normal"> 1243: SOURCE: loncom/homework/structuretags.pm 1244: TARGET: home/httpd/lib/perl/Apache/structuretags.pm 1245: </td> 1246: <td class="Normal"> 1247: produces HTML tags necessary for structuring the presentation of 1248: homework resources 1249: </td> 1250: </tr> 1251: <tr> 1252: <td class="Normal"> 1253: SOURCE: loncom/homework/response.pm 1254: TARGET: home/httpd/lib/perl/Apache/response.pm 1255: </td> 1256: <td class="Normal"> 1257: defines different types of responses given to student as well as 1258: syntax for producing response values 1259: </td> 1260: </tr> 1261: <tr> 1262: <td class="Normal"> 1263: SOURCE: loncom/homework/caparesponse/caparesponse.pm 1264: TARGET: home/httpd/lib/perl/Apache/caparesponse.pm 1265: </td> 1266: <td class="Normal"> 1267: handles request to the CAPA homework processing engine 1268: </td> 1269: </tr> 1270: <tr> 1271: <td class="Normal"> 1272: SOURCE: loncom/xml/Safe.pm 1273: TARGET: home/httpd/lib/perl/Safe.pm 1274: </td> 1275: <td class="Normal"> 1276: Meant to safely substitute for CPAN version of Safe. Allows for safely 1277: executing embedded perl comands in a way that does not threaten the 1278: operating system. 1279: </td> 1280: </tr> 1281: <tr> 1282: <td class="Normal"> 1283: SOURCE: loncom/auth/localauth.pm 1284: TARGET: home/httpd/lib/perl/localauth.pm 1285: </td> 1286: <td class="Normal"> 1287: Local authentication mechanism (meant to be customized). 1288: </td> 1289: </tr> 1290: <tr> 1291: <td class="Normal"> 1292: SOURCE: loncom/auth/lonacc.pm 1293: TARGET: home/httpd/lib/perl/Apache/lonacc.pm 1294: </td> 1295: <td class="Normal"> 1296: (This module, like loncacc.pm also authenticates with cookies.) lonacc.pm 1297: coordinates access to a wide range of administrative-type functions 1298: (e.g. roles, logout, annotations, and bookmarks) as well as coordinating 1299: access to educational resources. 1300: </td> 1301: </tr> 1302: <tr> 1303: <td class="Normal"> 1304: SOURCE: loncom/auth/lonracc.pm 1305: TARGET: home/httpd/lib/perl/Apache/lonracc.pm 1306: </td> 1307: <td class="Normal"> 1308: access handler for file transfers 1309: </td> 1310: </tr> 1311: <tr> 1312: <td class="Normal"> 1313: SOURCE: loncom/auth/loncacc.pm 1314: TARGET: home/httpd/lib/perl/Apache/loncacc.pm 1315: </td> 1316: <td class="Normal"> 1317: This module provides access to an educational resource construction 1318: area. This module is invoked by the URL-related pattern syntax LocationMatch 1319: "^/priv.*" or LocationMatch "^/\~.*". Authentication 1320: of user identity is coordinated through cookies. The abbreviation 1321: "cacc" corresponds to "construction-space access"). 1322: If the cookie handle is invalid, then this module returns a forbidden 1323: status and makes appropriate log entries. If the cookie handle is 1324: valid, status is determined to be okay (and, for the "priv"-type 1325: access, the resource is delivered by the lonconstruct module). 1326: </td> 1327: </tr> 1328: <tr> 1329: <td class="Normal"> 1330: SOURCE: loncom/auth/lonauth.pm 1331: TARGET: home/httpd/lib/perl/Apache/lonauth.pm 1332: </td> 1333: <td class="Normal"> 1334: authenticate, set up session environment 1335: </td> 1336: </tr> 1337: <tr> 1338: <td class="Normal"> 1339: SOURCE: loncom/auth/lonlogin.pm 1340: TARGET: home/httpd/lib/perl/Apache/lonlogin.pm 1341: </td> 1342: <td class="Normal"> 1343: login screen 1344: </td> 1345: </tr> 1346: <tr> 1347: <td class="Normal"> 1348: SOURCE: loncom/auth/lonlogout.pm 1349: TARGET: home/httpd/lib/perl/Apache/lonlogout.pm 1350: </td> 1351: <td class="Normal"> 1352: logout 1353: </td> 1354: </tr> 1355: <tr> 1356: <td class="Normal"> 1357: SOURCE: loncom/lonnet/perl/lonrep.pm 1358: TARGET: home/httpd/lib/perl/Apache/lonrep.pm 1359: </td> 1360: <td class="Normal"> 1361: replication 1362: </td> 1363: </tr> 1364: <tr> 1365: <td class="Normal"> 1366: SOURCE: loncom/auth/lonroles.pm 1367: TARGET: home/httpd/lib/perl/Apache/lonroles.pm 1368: </td> 1369: <td class="Normal"> 1370: This perl handling module reads in the available roles available 1371: for a LON-CAPA user (different courses, different privileges, etc) 1372: and produces a form-element HTML page which allows the user to select 1373: which role he wishes to exercise in the LON-CAPA system. For instance, 1374: a user may want to select between being a student in a thermodynamics 1375: physics course or a teaching assistant for an introductory calculus 1376: class. 1377: </td> 1378: </tr> 1379: <tr> 1380: <td class="Normal"> 1381: SOURCE: loncom/interface/lonindexer.pm 1382: TARGET: home/httpd/lib/perl/Apache/lonindexer.pm 1383: </td> 1384: <td class="Normal"> 1385: cross server filesystem browser 1386: </td> 1387: </tr> 1388: <tr> 1389: <td class="Normal"> 1390: SOURCE: loncom/interface/groupsort.pm 1391: TARGET: home/httpd/lib/perl/Apache/groupsort.pm 1392: </td> 1393: <td class="Normal"> 1394: Implements a second phase of importing multiple resources into the 1395: RAT. Allows for reordering the sequence of resources. 1396: </td> 1397: </tr> 1398: <tr> 1399: <td class="Normal"> 1400: SOURCE: loncom/lonnet/perl/lonnet.pm 1401: TARGET: home/httpd/lib/perl/Apache/lonnet.pm 1402: </td> 1403: <td class="Normal"> 1404: This file is an interface to the lonc processes of the LON-CAPA network 1405: as well as set of elaborated functions for handling information necessary 1406: for navigating through a given cluster of LON-CAPA machines within 1407: a domain. There are over 40 specialized functions in this module which 1408: handle the reading and transmission of metadata, user information 1409: (ids, names, environments, roles, logs), file information (storage, 1410: reading, directories, extensions, replication, embedded styles and 1411: descriptors), educational resources (course descriptions, section 1412: names and numbers), url hashing (to assign roles on a url basis), 1413: and translating abbreviated symbols to and from more descriptive phrases 1414: or explanations. 1415: </td> 1416: </tr> 1417: <tr> 1418: <td class="Normal"> 1419: SOURCE: loncom/homework/lectureonline.lcpm 1420: TARGET: home/httpd/html/res/adm/includes/lectureonline.lcpm 1421: </td> 1422: <td class="Normal"> 1423: Intended for providing perl functions for the <script></script> 1424: environment in a problem that was converted from lectureonline. 1425: </td> 1426: </tr> 1427: <tr> 1428: <td class="Normal"> 1429: SOURCE: loncom/homework/default_homework.lcpm 1430: TARGET: home/httpd/html/res/adm/includes/default_homework.lcpm 1431: </td> 1432: <td class="Normal"> 1433: Provides many functions for the <script> environment in a .problem. 1434: Functions are documented in CVS:loncapa/doc/homework/homework5.html. 1435: </td> 1436: </tr> 1437: </table> 1438: </div> 1439: </div> 1440: </body> 1441: </html>

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