+++ /dev/null
-/*
- * This is the other half of the webserver. It handles the task of hooking
- * up HTTP requests with the sessions they belong to, using HTTP cookies to
- * keep track of things. If the HTTP request doesn't belong to any currently
- * active session, a new session is started.
- *
- * Copyright (c) 1996-2012 by the citadel.org team
- *
- * This program is open source software. You can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 3.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include "webcit.h"
-#include "webserver.h"
-#include "modules_init.h"
-
-/* Only one thread may manipulate SessionList at a time... */
-pthread_mutex_t SessionListMutex;
-
-wcsession *SessionList = NULL; /* Linked list of all webcit sessions */
-
-HashList *HttpReqTypes = NULL;
-HashList *HttpHeaderHandler = NULL;
-extern HashList *HandlerHash;
-
-/* the following two values start at 1 because the initial parent thread counts as one. */
-int num_threads_existing = 1; /* Number of worker threads which exist. */
-int num_threads_executing = 1; /* Number of worker threads currently executing. */
-int verbose=0;
-
-extern void session_loop(void);
-void spawn_another_worker_thread(void);
-
-
-void DestroyHttpHeaderHandler(void *V)
-{
- OneHttpHeader *pHdr;
- pHdr = (OneHttpHeader*) V;
- FreeStrBuf(&pHdr->Val);
- free(pHdr);
-}
-
-void shutdown_sessions(void)
-{
- wcsession *sptr;
-
- for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
- sptr->killthis = 1;
- }
-}
-
-void do_housekeeping(void)
-{
- wcsession *sptr, *ss;
- wcsession *sessions_to_kill = NULL;
- time_t the_time;
-
- /*
- * Lock the session list, moving any candidates for euthanasia into
- * a separate list.
- */
- the_time = 0;
- CtdlLogResult(pthread_mutex_lock(&SessionListMutex));
- for (sptr = SessionList; sptr != NULL; sptr = sptr->next) {
- if (the_time == 0)
- the_time = time(NULL);
- /* Kill idle sessions */
- if ((sptr->inuse == 0) &&
- ((the_time - (sptr->lastreq)) > (time_t) WEBCIT_TIMEOUT))
- {
- syslog(LOG_DEBUG, "Timeout session %d", sptr->wc_session);
- sptr->killthis = 1;
- }
-
- /* Remove sessions flagged for kill */
- if (sptr->killthis) {
-
- /* remove session from linked list */
- if (sptr == SessionList) {
- SessionList = SessionList->next;
- }
- else for (ss=SessionList;ss!=NULL;ss=ss->next) {
- if (ss->next == sptr) {
- ss->next = ss->next->next;
- }
- }
-
- sptr->next = sessions_to_kill;
- sessions_to_kill = sptr;
- }
- }
- CtdlLogResult(pthread_mutex_unlock(&SessionListMutex));
-
- /*
- * Now free up and destroy the culled sessions.
- */
- while (sessions_to_kill != NULL) {
- syslog(LOG_DEBUG, "Destroying session %d", sessions_to_kill->wc_session);
- sptr = sessions_to_kill->next;
- session_destroy_modules(&sessions_to_kill);
- sessions_to_kill = sptr;
- }
-}
-
-/*
- * Check the size of our thread pool. If all threads are executing, spawn another.
- */
-void check_thread_pool_size(void)
-{
- if (time_to_die) return; /* don't expand the thread pool during shutdown */
-
- begin_critical_section(S_SPAWNER); /* only one of these should run at a time */
- if (
- (num_threads_executing >= num_threads_existing)
- && (num_threads_existing < MAX_WORKER_THREADS)
- ) {
- syslog(LOG_DEBUG, "%d of %d threads are executing. Adding another worker thread.",
- num_threads_executing,
- num_threads_existing
- );
- spawn_another_worker_thread();
- }
- end_critical_section(S_SPAWNER);
-}
-
-
-/*
- * Wake up occasionally and clean house
- */
-void housekeeping_loop(void)
-{
- while (1) {
- sleeeeeeeeeep(HOUSEKEEPING);
- do_housekeeping();
- }
-}
-
-
-/*
- * Create a Session id
- * Generate a unique WebCit session ID (which is not the same thing as the
- * Citadel session ID).
- */
-int GenerateSessionID(void)
-{
- static int seq = (-1);
-
- if (seq < 0) {
- seq = (int) time(NULL);
- }
-
- return ++seq;
-}
-
-wcsession *FindSession(wcsession **wclist, ParsedHttpHdrs *Hdr, pthread_mutex_t *ListMutex)
-{
- wcsession *sptr = NULL;
- wcsession *TheSession = NULL;
-
- if (Hdr->HR.got_auth == AUTH_BASIC) {
- GetAuthBasic(Hdr);
- }
-
- CtdlLogResult(pthread_mutex_lock(ListMutex));
- for (sptr = *wclist; ((sptr != NULL) && (TheSession == NULL)); sptr = sptr->next) {
-
- /* If HTTP-AUTH, look for a session with matching credentials */
- switch (Hdr->HR.got_auth)
- {
- case AUTH_BASIC:
- if ( (!strcasecmp(ChrPtr(Hdr->c_username), ChrPtr(sptr->wc_username)))
- && (!strcasecmp(ChrPtr(Hdr->c_password), ChrPtr(sptr->wc_password)))
- && (sptr->killthis == 0)
- ) {
- if (verbose)
- syslog(LOG_DEBUG, "Matched a session with the same http-auth");
- TheSession = sptr;
- }
- break;
- case AUTH_COOKIE:
- /* If cookie-session, look for a session with matching session ID */
- if ( (Hdr->HR.desired_session != 0)
- && (sptr->wc_session == Hdr->HR.desired_session)
- ) {
- if (verbose)
- syslog(LOG_DEBUG, "Matched a session with the same cookie");
- TheSession = sptr;
- }
- break;
- case NO_AUTH:
- /* Any unbound session is a candidate */
- if ( (sptr->wc_session == 0) && (sptr->inuse == 0) ) {
- if (verbose)
- syslog(LOG_DEBUG, "Reusing an unbound session");
- TheSession = sptr;
- }
- break;
- }
- }
- CtdlLogResult(pthread_mutex_unlock(ListMutex));
- if (TheSession == NULL) {
- syslog(LOG_DEBUG, "No existing session was matched");
- }
- return TheSession;
-}
-
-wcsession *CreateSession(int Lockable, int Static, wcsession **wclist, ParsedHttpHdrs *Hdr, pthread_mutex_t *ListMutex)
-{
- wcsession *TheSession;
- TheSession = (wcsession *) malloc(sizeof(wcsession));
- memset(TheSession, 0, sizeof(wcsession));
- TheSession->Hdr = Hdr;
- TheSession->serv_sock = (-1);
- TheSession->lastreq = time(NULL);;
-
- pthread_setspecific(MyConKey, (void *)TheSession);
-
- /* If we're recreating a session that expired, it's best to give it the same
- * session number that it had before. The client browser ought to pick up
- * the new session number and start using it, but in some rare situations it
- * doesn't, and that's a Bad Thing because it causes lots of spurious sessions
- * to get created.
- */
- if (Hdr->HR.desired_session == 0) {
- TheSession->wc_session = GenerateSessionID();
- syslog(LOG_DEBUG, "Created new session %d", TheSession->wc_session);
- }
- else {
- TheSession->wc_session = Hdr->HR.desired_session;
- syslog(LOG_DEBUG, "Re-created session %d", TheSession->wc_session);
- }
- Hdr->HR.Static = Static;
- session_new_modules(TheSession);
-
- if (Lockable) {
- pthread_mutex_init(&TheSession->SessionMutex, NULL);
-
- if (ListMutex != NULL)
- CtdlLogResult(pthread_mutex_lock(ListMutex));
-
- if (wclist != NULL) {
- TheSession->nonce = rand();
- TheSession->next = *wclist;
- *wclist = TheSession;
- }
- if (ListMutex != NULL)
- CtdlLogResult(pthread_mutex_unlock(ListMutex));
- }
- return TheSession;
-}
-
-
-/* If it's a "force 404" situation then display the error and bail. */
-void do_404(void)
-{
- hprintf("HTTP/1.1 404 Not found\r\n");
- hprintf("Content-Type: text/plain\r\n");
- wc_printf("Not found\r\n");
- end_burst();
-}
-
-int ReadHttpSubject(ParsedHttpHdrs *Hdr, StrBuf *Line, StrBuf *Buf)
-{
- const char *Args;
- void *vLine, *vHandler;
- const char *Pos = NULL;
-
- Hdr->HR.ReqLine = Line;
- /* The requesttype... GET, POST... */
- StrBufExtract_token(Buf, Hdr->HR.ReqLine, 0, ' ');
- if (GetHash(HttpReqTypes, SKEY(Buf), &vLine) &&
- (vLine != NULL))
- {
- Hdr->HR.eReqType = *(long*)vLine;
- }
- else {
- Hdr->HR.eReqType = eGET;
- return 1;
- }
- StrBufCutLeft(Hdr->HR.ReqLine, StrLength(Buf) + 1);
-
- /* the HTTP Version... */
- StrBufExtract_token(Buf, Hdr->HR.ReqLine, 1, ' ');
- StrBufCutRight(Hdr->HR.ReqLine, StrLength(Buf) + 1);
-
- if (StrLength(Buf) == 0) {
- Hdr->HR.eReqType = eGET;
- return 1;
- }
-
- StrBufAppendBuf(Hdr->this_page, Hdr->HR.ReqLine, 0);
-
- /* chop Filename / query arguments */
- Args = strchr(ChrPtr(Hdr->HR.ReqLine), '?');
- if (Args == NULL) /* whe're not that picky about params... TODO: this will spoil '&' in filenames.*/
- Args = strchr(ChrPtr(Hdr->HR.ReqLine), '&');
- if (Args != NULL) {
- Args ++; /* skip the ? */
- StrBufPlain(Hdr->PlainArgs,
- Args,
- StrLength(Hdr->HR.ReqLine) -
- (Args - ChrPtr(Hdr->HR.ReqLine)));
- StrBufCutAt(Hdr->HR.ReqLine, 0, Args - 1);
- } /* don't parse them yet, maybe we don't even care... */
-
- /* now lookup what we are going to do with this... */
- /* skip first slash */
- StrBufExtract_NextToken(Buf, Hdr->HR.ReqLine, &Pos, '/');
- do {
- StrBufExtract_NextToken(Buf, Hdr->HR.ReqLine, &Pos, '/');
-
- GetHash(HandlerHash, SKEY(Buf), &vHandler),
- Hdr->HR.Handler = (WebcitHandler*) vHandler;
- if (Hdr->HR.Handler == NULL)
- break;
- /*
- * If the request is prefixed by "/webcit" then chop that off. This
- * allows a front end web server to forward all /webcit requests to us
- * while still using the same web server port for other things.
- */
- if ((Hdr->HR.Handler->Flags & URLNAMESPACE) != 0)
- continue;
- break;
- } while (1);
- /* remove the handlername from the URL */
- if ((Pos != NULL) && (Pos != StrBufNOTNULL)){
- StrBufCutLeft(Hdr->HR.ReqLine,
- Pos - ChrPtr(Hdr->HR.ReqLine));
- }
-
- if (Hdr->HR.Handler != NULL) {
- if ((Hdr->HR.Handler->Flags & BOGUS) != 0) {
- return 1;
- }
- Hdr->HR.DontNeedAuth = (
- ((Hdr->HR.Handler->Flags & ISSTATIC) != 0) ||
- ((Hdr->HR.Handler->Flags & ANONYMOUS) != 0)
- );
- }
- else {
- /* If this is a "flat" request for the root, display the configured landing page. */
- int return_value;
- StrBuf *NewLine = NewStrBuf();
- Hdr->HR.DontNeedAuth = 1;
- StrBufAppendPrintf(NewLine, "GET /landing?go=%s?failvisibly=1 HTTP/1.0", ChrPtr(Buf));
- if (verbose) syslog(LOG_DEBUG, "Replacing with: %s", ChrPtr(NewLine));
- return_value = ReadHttpSubject(Hdr, NewLine, Buf);
- FreeStrBuf(&NewLine);
- return return_value;
- }
-
- return 0;
-}
-
-int AnalyseHeaders(ParsedHttpHdrs *Hdr) {
- OneHttpHeader *pHdr;
- void *vHdr;
- long HKLen;
- const char *HashKey;
- HashPos *at = GetNewHashPos(Hdr->HTTPHeaders, 0);
-
- while (GetNextHashPos(Hdr->HTTPHeaders, at, &HKLen, &HashKey, &vHdr) &&
- (vHdr != NULL)) {
- pHdr = (OneHttpHeader *)vHdr;
- if (pHdr->HaveEvaluator)
- pHdr->H(pHdr->Val, Hdr);
-
- }
- DeleteHashPos(&at);
- return 0;
-}
-
-
-/*
- * Read in the request
- */
-int ReadHTTPRequest(ParsedHttpHdrs *Hdr) {
- const char *pch, *pchs, *pche;
- OneHttpHeader *pHdr;
- StrBuf *Line, *LastLine, *HeaderName;
- int nLine = 0;
- void *vF;
- int isbogus = 0;
-
- HeaderName = NewStrBuf();
- LastLine = NULL;
- do {
- nLine ++;
- Line = NewStrBufPlain(NULL, SIZ / 4);
-
- if (ClientGetLine(Hdr, Line) < 0) {
- FreeStrBuf(&Line);
- isbogus = 1;
- break;
- }
-
- if (StrLength(Line) == 0) {
- FreeStrBuf(&Line);
- continue;
- }
- if (nLine == 1) {
- Hdr->HTTPHeaders = NewHash(1, NULL);
- pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
- memset(pHdr, 0, sizeof(OneHttpHeader));
- pHdr->Val = Line;
- Put(Hdr->HTTPHeaders, HKEY("GET /"), pHdr, DestroyHttpHeaderHandler);
- if (verbose || strstr(ChrPtr(Line), "sslg") == NULL) {
- syslog(LOG_DEBUG, "%s", ChrPtr(Line));
- }
- isbogus = ReadHttpSubject(Hdr, Line, HeaderName);
- if (isbogus) break;
- continue;
- }
-
- /* Do we need to Unfold? */
- if ((LastLine != NULL) && (isspace(*ChrPtr(Line)))) {
- pch = pchs = ChrPtr(Line);
- pche = pchs + StrLength(Line);
- while (isspace(*pch) && (pch < pche)) {
- pch ++;
- }
- StrBufCutLeft(Line, pch - pchs);
- StrBufAppendBuf(LastLine, Line, 0);
-
- FreeStrBuf(&Line);
- continue;
- }
-
- StrBufSanitizeAscii(Line, (char)0xa7);
- StrBufExtract_token(HeaderName, Line, 0, ':');
-
- pchs = ChrPtr(Line);
- pche = pchs + StrLength(Line);
- pch = pchs + StrLength(HeaderName) + 1;
- pche = pchs + StrLength(Line);
- while ((pch < pche) && isspace(*pch)) {
- pch ++;
- }
- StrBufCutLeft(Line, pch - pchs);
- StrBufUpCase(HeaderName);
-
- pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
- memset(pHdr, 0, sizeof(OneHttpHeader));
- pHdr->Val = Line;
-
- if (GetHash(HttpHeaderHandler, SKEY(HeaderName), &vF) && (vF != NULL)) {
- OneHttpHeader *FHdr = (OneHttpHeader*) vF;
- pHdr->H = FHdr->H;
- pHdr->HaveEvaluator = 1;
- }
- Put(Hdr->HTTPHeaders, SKEY(HeaderName), pHdr, DestroyHttpHeaderHandler);
- LastLine = Line;
- } while (Line != NULL);
-
- FreeStrBuf(&HeaderName);
-
- return isbogus;
-}
-
-void OverrideRequest(ParsedHttpHdrs *Hdr, const char *Line, long len)
-{
- StrBuf *Buf = NewStrBuf();
-
- if (Hdr->HR.ReqLine != NULL) {
- FlushStrBuf(Hdr->HR.ReqLine);
- StrBufPlain(Hdr->HR.ReqLine, Line, len);
- }
- else {
- Hdr->HR.ReqLine = NewStrBufPlain(Line, len);
- }
- ReadHttpSubject(Hdr, Hdr->HR.ReqLine, Buf);
-
- FreeStrBuf(&Buf);
-}
-
-/*
- * handle one request
- *
- * This loop gets called once for every HTTP connection made to WebCit. At
- * this entry point we have an HTTP socket with a browser allegedly on the
- * other end, but we have not yet bound to a WebCit session.
- *
- * The job of this function is to locate the correct session and bind to it,
- * or create a session if necessary and bind to it, then run the WebCit
- * transaction loop. Afterwards, we unbind from the session. When this
- * function returns, the worker thread is then free to handle another
- * transaction.
- */
-void context_loop(ParsedHttpHdrs *Hdr) {
- int isbogus = 0;
- wcsession *TheSession;
- struct timeval tx_start;
- struct timeval tx_finish;
- int session_may_be_reused = 1;
- time_t now;
-
- gettimeofday(&tx_start, NULL); /* start a stopwatch for performance timing */
-
- /*
- * Find out what it is that the web browser is asking for
- */
- isbogus = ReadHTTPRequest(Hdr);
-
- Hdr->HR.dav_depth = 32767; /* TODO: find a general way to have non-0 defaults */
-
- if (!isbogus) {
- isbogus = AnalyseHeaders(Hdr);
- }
-
- if ( (isbogus)
- || ((Hdr->HR.Handler != NULL)
- && ((Hdr->HR.Handler->Flags & BOGUS) != 0))
- ) {
- wcsession *Bogus;
- Bogus = CreateSession(0, 1, NULL, Hdr, NULL);
- do_404();
- syslog(LOG_WARNING, "HTTP: 404 [%ld.%06ld] %s %s",
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
- ReqStrs[Hdr->HR.eReqType],
- ChrPtr(Hdr->this_page)
- );
- session_detach_modules(Bogus);
- session_destroy_modules(&Bogus);
- return;
- }
-
- if ((Hdr->HR.Handler != NULL) && ((Hdr->HR.Handler->Flags & ISSTATIC) != 0)) {
- wcsession *Static;
- Static = CreateSession(0, 1, NULL, Hdr, NULL);
-
- Hdr->HR.Handler->F();
-
- /* How long did this transaction take? */
- gettimeofday(&tx_finish, NULL);
-
- if (verbose)
- syslog(LOG_DEBUG, "HTTP: 200 [%ld.%06ld] %s %s",
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
- ReqStrs[Hdr->HR.eReqType],
- ChrPtr(Hdr->this_page)
- );
- session_detach_modules(Static);
- session_destroy_modules(&Static);
- return;
- }
-
- if (Hdr->HR.got_auth == AUTH_BASIC) {
- CheckAuthBasic(Hdr);
- }
-
- if (Hdr->HR.got_auth) {
- session_may_be_reused = 0;
- }
-
- /*
- * See if there's an existing session open with any of:
- * - The desired Session ID
- * - A matching http-auth username and password
- * - An unbound session flagged as reusable
- */
- TheSession = FindSession(&SessionList, Hdr, &SessionListMutex);
-
- /*
- * If there were no qualifying sessions, then create a new one.
- */
- if ((TheSession == NULL) || (TheSession->killthis != 0)) {
- TheSession = CreateSession(1, 0, &SessionList, Hdr, &SessionListMutex);
- }
-
- /*
- * Reject transactions which require http-auth, if http-auth was not provided
- */
- if ( (StrLength(Hdr->c_username) == 0)
- && (!Hdr->HR.DontNeedAuth)
- && (Hdr->HR.Handler != NULL)
- && ((XHTTP_COMMANDS & Hdr->HR.Handler->Flags) == XHTTP_COMMANDS)
- ) {
- syslog(LOG_DEBUG, "http-auth required but not provided");
- OverrideRequest(Hdr, HKEY("GET /401 HTTP/1.0"));
- Hdr->HR.prohibit_caching = 1;
- }
-
- /*
- * A future improvement might be to check the session integrity
- * at this point before continuing.
- */
-
- /*
- * Bind to the session and perform the transaction
- */
- now = time(NULL);;
- CtdlLogResult(pthread_mutex_lock(&TheSession->SessionMutex));
- pthread_setspecific(MyConKey, (void *)TheSession);
-
- TheSession->inuse = 1; /* mark the session as bound */
- TheSession->isFailure = 0; /* reset evntually existing error flags */
- TheSession->lastreq = now; /* log */
- TheSession->Hdr = Hdr;
-
- /*
- * If a language was requested via a cookie, select that language now.
- */
- if (StrLength(Hdr->c_language) > 0) {
- if (verbose) {
- syslog(LOG_DEBUG, "Session cookie requests language '%s'", ChrPtr(Hdr->c_language));
- }
- set_selected_language(ChrPtr(Hdr->c_language));
- go_selected_language();
- }
-
- /*
- * do the transaction
- */
- session_attach_modules(TheSession);
- session_loop();
-
- /* How long did this transaction take? */
- gettimeofday(&tx_finish, NULL);
-
- if (verbose || strstr(ChrPtr(Hdr->this_page), "sslg") == NULL) {
- syslog(LOG_INFO, "HTTP: 200 [%ld.%06ld] %s %s",
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) / 1000000,
- ((tx_finish.tv_sec*1000000 + tx_finish.tv_usec) - (tx_start.tv_sec*1000000 + tx_start.tv_usec)) % 1000000,
- ReqStrs[Hdr->HR.eReqType],
- ChrPtr(Hdr->this_page)
- );
- }
- session_detach_modules(TheSession);
-
- /* If *this* very transaction did not explicitly specify a session cookie,
- * and it did not log in, we want to flag the session as a candidate for
- * re-use by the next unbound client that comes along. This keeps our session
- * table from getting bombarded with new sessions when, for example, a web
- * spider crawls the site without using cookies.
- */
- if ((session_may_be_reused) && (!TheSession->logged_in)) {
- TheSession->wc_session = 0; /* flag as available for re-use */
- TheSession->selected_language = -1; /* clear any non-default language setting */
- }
-
- TheSession->Hdr = NULL;
- TheSession->inuse = 0; /* mark the session as unbound */
- CtdlLogResult(pthread_mutex_unlock(&TheSession->SessionMutex));
-}
-
-void tmplput_nonce(StrBuf *Target, WCTemplputParams *TP)
-{
- wcsession *WCC = WC;
- StrBufAppendPrintf(Target, "%ld",
- (WCC != NULL)? WCC->nonce:0);
-}
-
-void tmplput_current_user(StrBuf *Target, WCTemplputParams *TP)
-{
- StrBufAppendTemplate(Target, TP, WC->wc_fullname, 0);
-}
-
-void Header_HandleContentLength(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- hdr->HR.ContentLength = StrToi(Line);
-}
-
-void Header_HandleContentType(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- hdr->HR.ContentType = Line;
-}
-
-
-void Header_HandleHost(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- if (hdr->HostHeader != NULL) {
- FreeStrBuf(&hdr->HostHeader);
- }
- hdr->HostHeader = NewStrBuf();
- StrBufAppendPrintf(hdr->HostHeader, "%s://", (is_https ? "https" : "http") );
- StrBufAppendBuf(hdr->HostHeader, Line, 0);
-}
-
-void Header_HandleXFFHost(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- if (!follow_xff) return;
-
- if (hdr->HostHeader != NULL) {
- FreeStrBuf(&hdr->HostHeader);
- }
-
- hdr->HostHeader = NewStrBuf();
- StrBufAppendPrintf(hdr->HostHeader, "http://"); /* this is naive; do something about it */
- StrBufAppendBuf(hdr->HostHeader, Line, 0);
-}
-
-
-void Header_HandleXFF(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- hdr->HR.browser_host = Line;
-
- while (StrBufNum_tokens(hdr->HR.browser_host, ',') > 1) {
- StrBufRemove_token(hdr->HR.browser_host, 0, ',');
- }
- StrBufTrim(hdr->HR.browser_host);
-}
-
-void Header_HandleIfModSince(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- hdr->HR.if_modified_since = httpdate_to_timestamp(Line);
-}
-
-void Header_HandleAcceptEncoding(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- /*
- * Can we compress?
- */
- if (strstr(&ChrPtr(Line)[16], "gzip")) {
- hdr->HR.gzip_ok = 1;
- }
-}
-
-void Header_HandleContentRange(StrBuf *Line, ParsedHttpHdrs *hdr)
-{
- const char *PRange = ChrPtr(Line);
-
- while ((*PRange != '=') && (*PRange != '\0'))
- PRange ++;
- if (*PRange == '=')
- PRange ++;
- if ((*PRange == '\0'))
- return;
- hdr->HaveRange = 1;
- hdr->RangeStart = atol(PRange);
-
- while (isdigit(*PRange))
- PRange++;
-
- if (*PRange == '-')
- PRange ++;
- if ((*PRange == '\0'))
- hdr->RangeTil = -1;
- else
- hdr->RangeTil = atol(PRange);
-}
-
-const char *ReqStrs[eNONE] = {
- "GET",
- "POST",
- "OPTIONS",
- "PROPFIND",
- "PUT",
- "DELETE",
- "HEAD",
- "MOVE",
- "COPY",
- "REPORT"
-};
-
-void
-ServerStartModule_CONTEXT
-(void)
-{
- long *v;
- HttpReqTypes = NewHash(1, NULL);
- HttpHeaderHandler = NewHash(1, NULL);
-
- v = malloc(sizeof(long));
- *v = eGET;
- Put(HttpReqTypes, HKEY("GET"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = ePOST;
- Put(HttpReqTypes, HKEY("POST"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eOPTIONS;
- Put(HttpReqTypes, HKEY("OPTIONS"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = ePROPFIND;
- Put(HttpReqTypes, HKEY("PROPFIND"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = ePUT;
- Put(HttpReqTypes, HKEY("PUT"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eDELETE;
- Put(HttpReqTypes, HKEY("DELETE"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eHEAD;
- Put(HttpReqTypes, HKEY("HEAD"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eMOVE;
- Put(HttpReqTypes, HKEY("MOVE"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eCOPY;
- Put(HttpReqTypes, HKEY("COPY"), v, NULL);
-
- v = malloc(sizeof(long));
- *v = eREPORT;
- Put(HttpReqTypes, HKEY("REPORT"), v, NULL);
-}
-
-void
-ServerShutdownModule_CONTEXT
-(void)
-{
- DeleteHash(&HttpReqTypes);
- DeleteHash(&HttpHeaderHandler);
-}
-
-void RegisterHeaderHandler(const char *Name, long Len, Header_Evaluator F)
-{
- OneHttpHeader *pHdr;
- pHdr = (OneHttpHeader*) malloc(sizeof(OneHttpHeader));
- memset(pHdr, 0, sizeof(OneHttpHeader));
- pHdr->H = F;
- Put(HttpHeaderHandler, Name, Len, pHdr, DestroyHttpHeaderHandler);
-}
-
-
-void
-InitModule_CONTEXT
-(void)
-{
- RegisterHeaderHandler(HKEY("RANGE"), Header_HandleContentRange);
- RegisterHeaderHandler(HKEY("CONTENT-LENGTH"), Header_HandleContentLength);
- RegisterHeaderHandler(HKEY("CONTENT-TYPE"), Header_HandleContentType);
- RegisterHeaderHandler(HKEY("X-FORWARDED-HOST"), Header_HandleXFFHost); /* Apache way... */
- RegisterHeaderHandler(HKEY("X-REAL-IP"), Header_HandleXFFHost); /* NGinX way... */
- RegisterHeaderHandler(HKEY("HOST"), Header_HandleHost);
- RegisterHeaderHandler(HKEY("X-FORWARDED-FOR"), Header_HandleXFF);
- RegisterHeaderHandler(HKEY("ACCEPT-ENCODING"), Header_HandleAcceptEncoding);
- RegisterHeaderHandler(HKEY("IF-MODIFIED-SINCE"), Header_HandleIfModSince);
-
- RegisterNamespace("CURRENT_USER", 0, 1, tmplput_current_user, NULL, CTX_NONE);
- RegisterNamespace("NONCE", 0, 0, tmplput_nonce, NULL, 0);
-
- WebcitAddUrlHandler(HKEY("404"), "", 0, do_404, ANONYMOUS|COOKIEUNNEEDED);
-/*
- * Look for commonly-found probes of malware such as worms, viruses, trojans, and Microsoft Office.
- * Short-circuit these requests so we don't have to send them through the full processing loop.
- */
- WebcitAddUrlHandler(HKEY("scripts"), "", 0, do_404, ANONYMOUS|BOGUS); /* /root.exe - Worms and trojans and viruses, oh my! */
- WebcitAddUrlHandler(HKEY("c"), "", 0, do_404, ANONYMOUS|BOGUS); /* /winnt */
- WebcitAddUrlHandler(HKEY("MSADC"), "", 0, do_404, ANONYMOUS|BOGUS);
- WebcitAddUrlHandler(HKEY("_vti"), "", 0, do_404, ANONYMOUS|BOGUS); /* Broken Microsoft DAV implementation */
- WebcitAddUrlHandler(HKEY("MSOffice"), "", 0, do_404, ANONYMOUS|BOGUS); /* Stoopid MSOffice thinks everyone is IIS */
- WebcitAddUrlHandler(HKEY("nonexistenshit"), "", 0, do_404, ANONYMOUS|BOGUS); /* Exploit found in the wild January 2009 */
-}
-
-
-void
-HttpNewModule_CONTEXT
-(ParsedHttpHdrs *httpreq)
-{
- httpreq->PlainArgs = NewStrBufPlain(NULL, SIZ);
- httpreq->this_page = NewStrBufPlain(NULL, SIZ);
-}
-
-void
-HttpDetachModule_CONTEXT
-(ParsedHttpHdrs *httpreq)
-{
- FlushStrBuf(httpreq->PlainArgs);
- FlushStrBuf(httpreq->HostHeader);
- FlushStrBuf(httpreq->this_page);
- FlushStrBuf(httpreq->PlainArgs);
- DeleteHash(&httpreq->HTTPHeaders);
- memset(&httpreq->HR, 0, sizeof(HdrRefs));
-}
-
-void
-HttpDestroyModule_CONTEXT
-(ParsedHttpHdrs *httpreq)
-{
- FreeStrBuf(&httpreq->this_page);
- FreeStrBuf(&httpreq->PlainArgs);
- FreeStrBuf(&httpreq->this_page);
- FreeStrBuf(&httpreq->PlainArgs);
- FreeStrBuf(&httpreq->HostHeader);
- DeleteHash(&httpreq->HTTPHeaders);
-
-}
projects / citadel.git / blobdiff