/*
* run the request
*/
static HTTPResponse *_runRequest(WOAppReq *app, WOAppHandle woappHandle, WOInstanceHandle instHandle, HTTPRequest *req) {
WOConnection *c;
HTTPResponse *resp = NULL;
int send_status, keepConnection, retryRequest = 0;
const char *idString = NULL;
WOLog(WO_INFO,"Trying to contact %s:%s on %s(%d)", app->name,app->instance,app->host,app->port);
/* Tag the request with a unique identifier (if it hasn't been already) */
/* (It might already have been tagged if we are retrying the request due to refusing new sessions, for example) */
idString = req_HeaderForKey(req, REQUEST_ID_HEADER);
if (idString == NULL)
{
String *requestID = tr_uniqueID();
if (requestID)
{
req_addHeader(req, REQUEST_ID_HEADER, requestID->text, STR_COPYVALUE);
idString = req_HeaderForKey(req, REQUEST_ID_HEADER);
str_free(requestID);
}
}
do {
c = tr_open(instHandle); /* connect */
if (c == NULL) {
WOLog(WO_INFO,"%s:%s NOT LISTENING on %s(%d)", app->name,app->instance,app->host,app->port);
app->error = err_connect;
return NULL;
}
/*
* app found and is listening on port
*/
if (app->scheduler->beginTransaction)
app->scheduler->beginTransaction(app, instHandle);
/* Make sure that we're the only connection header, and we're explicit about the setting */
req_removeHeader(req,CONNECTION);
if (c->isPooled) {
req_addHeader(req,CONNECTION,HTTP_KEEP_ALIVE,0);
} else {
req_addHeader(req,CONNECTION,HTTP_CLOSE,0);
}
WOLog(WO_INFO,"%s:%s on %s(%d) connected [pooled: %s]", app->name, app->instance, app->host, app->port, c->isPooled ? "Yes" : "No");
/*
* send the request....
*/
send_status = req_sendRequest(req, c->fd);
if (send_status != 0) {
if ((send_status == TR_RESET) && (retryRequest == 0) && !req->haveReadStreamedData) {
/* If we get here the connection was reset. This means the instance has either quit or crashed. */
/* Bump the generation number so all pooled connections to this instance will be invalidated. */
/* Then retry the request with a new connection. If the instance is not running the retry will */
/* fail with a different error and the instance will be marked dead. */
_WOInstance *inst = ac_lockInstance(instHandle);
/* note: if we get here, keepConnection == 0 --> this connection will be closed */
if (inst)
{
ac_cycleInstance(inst, c->generation);
ac_unlockInstance(instHandle);
}
retryRequest++;
WOLog(WO_INFO, "retrying request due to connection reset");
/* Must close connection before continuing */
tr_close(c, instHandle, 0);
continue;
} else {
WOLog(WO_ERR,"Failed to send request");
tr_close(c, instHandle, 0); /* close app connection */
if (send_status == -1)
app->error = err_read;
else
app->error = err_send;
return NULL;
}
}
/* Note that we have a request queued */
WOLog(WO_INFO,"Request %s sent, awaiting response", req->request_str);
/* While the app is processing the request, take the opportunity to check/update the config. */
ac_readConfiguration();
/*
* now wait for the response...
*/
resp = resp_getResponseHeaders(c, instHandle);
/* go ahead and read the first chunk of response data */
if (resp && req->method != HTTP_HEAD_METHOD)
{
if (resp_getResponseContent(resp, 1) == -1)
{
resp_free(resp);
resp = NULL;
}
}
/* Validate the ID */
if (idString && resp)
{
const char *respID = st_valueFor(resp->headers, REQUEST_ID_HEADER);
if (respID != NULL)
{
if (strcmp(respID, idString) != 0)
{
WOLog(WO_ERR, "Got response with wrong ID! Dumping response. request ID = %s, response ID = %s", idString, respID);
/* note this will cause the connection to be closed below */
resp_free(resp);
resp = NULL;
} else
st_removeKey(resp->headers, REQUEST_ID_HEADER);
} else
WOLog(WO_WARN, "Got response with no ID.");
}
app->response = resp;
/*
* check if this connection can be kept open
*/
keepConnection = 0;
#ifndef CGI /* doesn't make sense to keep the connection for CGI */
if (resp && resp->headers)
{
const char *keepAlive;
keepAlive = st_valueFor(resp->headers, CONNECTION);
if (keepAlive)
{
/* if the keep alive header is set, honor the value */
if (strcasecmp(keepAlive, HTTP_KEEP_ALIVE) == 0)
keepConnection = 1;
} else {
/* no keep alive header - keep alive by default for HTTP/1.1 only */
if (resp->flags & RESP_HTTP11)
keepConnection = 1;
}
}
#endif
if (resp != NULL) {
if (app->scheduler->finalizeTransaction)
if (app->scheduler->finalizeTransaction(app, instHandle))
keepConnection = 0;
st_removeKey(resp->headers, REFUSING_SESSIONS_HEADER);
st_removeKey(resp->headers, LOAD_AVERAGE_HEADER);
st_removeKey(resp->headers, CONNECTION);
WOLog(WO_INFO,"received ->%d %s",resp->status,resp->statusMsg);
retryRequest = 0;
} else {
if (c != NULL && tr_connectionWasReset(c))
{
/* If we get here the connection was reset. This means the instance has either quit or crashed. */
/* Bump the generation number so all pooled connections to this instance will be invalidated. */
/* Then retry the request with a new connection. If the instance is not running the retry will */
/* fail with a different error and the instance will be marked dead. */
/* Note that only one retry due to a connection reset error is allowed. This is to prevent an */
/* infinite loop if the instance dies while processing the request and restarts quickly enough */
/* to process the retry. */
_WOInstance *inst = ac_lockInstance(instHandle);
/* note: if we get here, keepConnection == 0 --> this connection will be closed */
if (inst)
{
ac_cycleInstance(inst, c->generation);
ac_unlockInstance(instHandle);
}
retryRequest++;
if (retryRequest == 1)
WOLog(WO_INFO, "retrying request due to connection reset");
} else
app->error = err_response;
}
if (resp && resp->content_read < resp->content_length)
{
resp->keepConnection = keepConnection;
resp->instHandle = instHandle;
resp->flags |= RESP_CLOSE_CONNECTION;
} else {
tr_close(c, instHandle, keepConnection);
}
} while (retryRequest == 1);
return resp;
}
static int readContentData(HTTPRequest *req, void *dataBuffer, int dataSize, int mustFill)
{
EXTENSION_CONTROL_BLOCK *p = (EXTENSION_CONTROL_BLOCK *)req->api_handle;
DWORD len_remaining = dataSize;
DWORD total_len_read = 0;
char *buffer = (char *)dataBuffer;
MS_BOOL readStatus;
unsigned int lenZeroCounter = 0;
DWORD len;
if(p->cbAvailable > req->total_len_read)
{
len = p->cbAvailable - req->total_len_read;
if(len > dataSize) len = dataSize;
memcpy(buffer, p->lpbData + req->total_len_read, len);
total_len_read += len;
len_remaining -= len;
}
/*
* IIS has a weird (or is it convenient?) data queuing mechanism...
*/
while(len_remaining > 0 &&
(mustFill || total_len_read == 0))
{
len = len_remaining;
readStatus = p->ReadClient (p->ConnID,buffer + total_len_read, &len);
if(readStatus == TRUE)
{
// 2009/04/29: avoid endless loops, because the ReadClient function
// will return TRUE but with zero bytes read if the
// socket on which the server is listening to the client
// is closed!!!
lenZeroCounter =
((len == 0)? (lenZeroCounter + 1) : 0);
if(lenZeroCounter > MAGIC_LEN_ZERO_LIMIT)
{
readStatus = FALSE;
}
}
if(readStatus != TRUE)
{
if(lenZeroCounter > MAGIC_LEN_ZERO_LIMIT)
{
WOLog(WO_ERR,"ReadClient failed (client socket closed?).");
}
else
{
WOLog(WO_ERR,"ReadClient failed");
}
die(p, INV_FORM_DATA, HTTP_BAD_REQUEST);
return -1;
}
total_len_read += len;
len_remaining -= len;
}
// still required? - BEGIN
if (req_HeaderForKey(req, CONTENT_LENGTH) == NULL) {
char *length;
length = (char *)WOMALLOC(32);
if (length)
{
sprintf(length,"%lu",req->content_length);
req_addHeader(req, CONTENT_LENGTH, length, STR_FREEVALUE);
}
if (p->lpszContentType != NULL)
req_addHeader(req, CONTENT_TYPE, p->lpszContentType, 0);
}
// still required? - END
req->total_len_read += total_len_read;
return total_len_read;
}
/*
* finish the job that the api stubs started..
*/
static HTTPResponse *_collectRequestInformation(WOAppReq *app, WOURLComponents *wc, const char *url, int urlVersion, HTTPRequest *req)
{
const char *urlerr;
/*
* we need to complete the URL parsing...
*/
if ((urlVersion == 4) || (urlVersion == 3)) {
urlerr = WOParseAndCheckURL(wc, url, urlVersion, req->shouldProcessUrl);
} else {
urlerr = "Unsupported URL version";
WOLog(WO_WARN, "Unsupported URL version (%d) on %s", urlVersion, app->name);
}
if (urlerr != NULL)
return resp_errorResponse(urlerr, HTTP_BAD_REQUEST);
/*
* pick up the app name & host (if any) & instance
*/
if (wc->applicationName.length == 0)
return resp_errorResponse(NO_APPNAME, HTTP_BAD_REQUEST);
strncpy(app->name, wc->applicationName.start, wc->applicationName.length);
app->name[wc->applicationName.length] = '\0';
if (app->name[wc->applicationName.length - 1] == '/') /* garbage? */
app->name[wc->applicationName.length - 1] = '\0';
if (wc->applicationHost.length > 0) {
strncpy(app->host, wc->applicationHost.start, wc->applicationHost.length);
app->host[wc->applicationHost.length] = '\0';
} else
app->host[0] = '\0';
/*
* is the session/application information in the URL?
* if not, look in the cookies for the application instance number
* in the cookies.
*/
app->instance[0] = 0; /* default to any instance */
if (wc->applicationNumber.length > 0) {
if (wc->applicationNumber.length < WA_MAX_INSTANCE_NUMBER_LENGTH)
{
memcpy(app->instance, wc->applicationNumber.start, wc->applicationNumber.length);
app->instance[wc->applicationNumber.length] = 0;
}
} else {
const char *cookie, *woinst;
cookie = req_HeaderForKey(req, COOKIE);
if (cookie && ((woinst = strstr(cookie, INST_COOKIE)) != NULL)) {
const char *instid = &woinst[sizeof(INST_COOKIE)-1];
int len = 0;
while (len < WA_MAX_INSTANCE_NUMBER_LENGTH && instid[len] != ';' && instid[len])
len++;
if (len < WA_MAX_INSTANCE_NUMBER_LENGTH)
{
memcpy(app->instance, instid, len);
app->instance[len] = 0;
}
// remove any quotes from the instance number
#ifdef _MSC_VER // SWK Start VC can't define attributes here using '{' fixed it
{
#endif
char *before, *after;
before = after = app->instance;
while(*before){
if((*before == '\'') || (*before == '"')){
before++;
}
*after++ = *before++;
}
*after = 0;
#ifdef _MSC_VER // SWK End
}
#endif
WOLog(WO_INFO,"Cookie instance %s from %s",app->instance,cookie);
}
}
app->urlVersion = (wc->webObjectsVersion.start) ?
atoi(wc->webObjectsVersion.start) : CURRENT_WOF_VERSION_MAJOR;
/*
* Add the adaptor identifier header.
* WOFramework checks for the presence of this header, so the name should not change.
* (The value of the header is ignored by WOFramework.)
*/
req_addHeader(req, "x-webobjects-adaptor-version", WA_adaptorName, 0);
return NULL; /* no errors */
}
/*
* the thing that gets called...
*/
__declspec(dllexport) DWORD HttpExtensionProc(EXTENSION_CONTROL_BLOCK *p)
{
HTTPRequest *req;
HTTPResponse *resp = NULL;
WOURLComponents wc = WOURLComponents_Initializer;
const char *reqerr;
const char *qs;
char *script_name;
char *server_protocol;
char *uri;
WOURLError urlerr;
if (!adaptorEnabled)
{
WOLog(WO_ERR, "WebObjects adaptor disabled.");
return HSE_STATUS_ERROR;
}
/*
* extract WebObjects request components from URI
*/
script_name = getHeader(p, CGI_SCRIPT_NAME);
uri = WOMALLOC(strlen(p->lpszPathInfo) + strlen(script_name) + 1);
strcpy(uri, script_name);
strcat(uri, p->lpszPathInfo);
WOLog(WO_INFO,"<WebObjects ISAPI> new request: %s", uri);
WOFREE(script_name);
urlerr = WOParseApplicationName(&wc, uri);
if (urlerr != WOURLOK) {
const char *_urlerr;
_urlerr = WOURLstrerror(urlerr);
WOLog(WO_INFO,"URL Parsing Error: %s", _urlerr);
if (urlerr == WOURLInvalidApplicationName) {
if (ac_authorizeAppListing(&wc)) {
resp = WOAdaptorInfo(NULL, &wc);
WOFREE(uri); /* this has to be freed before a return in this function */
return die_resp(p, resp);
} else {
WOFREE(uri); /* this has to be freed before a return in this function */
return die(p, _urlerr, HTTP_NOT_FOUND);
}
}
WOFREE(uri); /* this has to be freed before a return in this function */
return die(p, _urlerr, HTTP_BAD_REQUEST);
}
/*
* build the request...
*/
req = req_new(p->lpszMethod, NULL);
/*
* validate the method
*/
reqerr = req_validateMethod(req);
if (reqerr) {
req_free(req);
WOFREE(uri); /* this has to be freed before a return in this function */
return die(p,reqerr, HTTP_BAD_REQUEST);
}
/*
* get the headers....
*/
copyHeaders(p, req);
/*
* get form data if any
* assume that POSTs with content length will be reformatted to GETs later
*/
req->content_length = p->cbTotalBytes;
if (req->content_length > 0)
{
char *buffer = WOMALLOC(req->content_length);
if (p->cbAvailable > 0)
memcpy(buffer, p->lpbData, p->cbAvailable);
/*
* IIS has a weird (or is it convenient?) data queuing mechanism...
*/
if (req->content_length > p->cbAvailable) {
DWORD len;
DWORD totalLength, fetchedLength;
len = req->content_length - p->cbAvailable;
totalLength = len;
fetchedLength = 0;
while (fetchedLength < totalLength) {
len = totalLength - fetchedLength;
if (p->ReadClient (p->ConnID,buffer + p->cbAvailable + fetchedLength, &len) != TRUE) {
WOFREE(buffer);
req_free(req);
return die(p, INV_FORM_DATA, HTTP_BAD_REQUEST);
}
fetchedLength += len;
}
}
req->content = buffer;
if (req_HeaderForKey(req, CONTENT_LENGTH) == NULL) {
char *length;
length = (char *)WOMALLOC(32);
if (length)
{
sprintf(length,"%d",req->content_length);
req_addHeader(req, CONTENT_LENGTH, length, STR_FREEVALUE);
}
if (p->lpszContentType != NULL)
req_addHeader(req, CONTENT_TYPE, p->lpszContentType, 0);
}
}
/* Always get the query string */
qs = p->lpszQueryString;
wc.queryString.start = qs;
wc.queryString.length = qs ? strlen(qs) : 0;
/*
* message the application & collect the response
*
* note that handleRequest free()'s the 'req' for us
*/
if (resp == NULL) {
/* if no error so far... */
req->api_handle = p; /* stash this... */
server_protocol = getHeader(p, CGI_SERVER_PROTOCOL);
resp = tr_handleRequest(req, uri, &wc, server_protocol, NULL);
WOFREE(server_protocol);
}
if (resp != NULL) {
sendResponse(p, resp);
resp_free(resp);
}
WOFREE(uri); /* this has to be freed before a return in this function */
req_free(req);
#if defined(FINDLEAKS)
showleaks();
#endif
return HSE_STATUS_SUCCESS;
}
