static int check_speling(request_rec *r)
{
spconfig *cfg;
char *good, *bad, *postgood, *url;
int filoc, dotloc, urlen, pglen;
DIR *dirp;
struct DIR_TYPE *dir_entry;
array_header *candidates = NULL;
cfg = ap_get_module_config(r->per_dir_config, &speling_module);
if (!cfg->enabled) {
return DECLINED;
}
/* We only want to worry about GETs */
if (r->method_number != M_GET) {
return DECLINED;
}
/* We've already got a file of some kind or another */
if (r->proxyreq != NOT_PROXY || (r->finfo.st_mode != 0)) {
return DECLINED;
}
/* This is a sub request - don't mess with it */
if (r->main) {
return DECLINED;
}
/*
* The request should end up looking like this:
* r->uri: /correct-url/mispelling/more
* r->filename: /correct-file/mispelling r->path_info: /more
*
* So we do this in steps. First break r->filename into two pieces
*/
filoc = ap_rind(r->filename, '/');
/*
* Don't do anything if the request doesn't contain a slash, or
* requests "/"
*/
if (filoc == -1 || strcmp(r->uri, "/") == 0) {
return DECLINED;
}
/* good = /correct-file */
good = ap_pstrndup(r->pool, r->filename, filoc);
/* bad = mispelling */
bad = ap_pstrdup(r->pool, r->filename + filoc + 1);
/* postgood = mispelling/more */
postgood = ap_pstrcat(r->pool, bad, r->path_info, NULL);
urlen = strlen(r->uri);
pglen = strlen(postgood);
/* Check to see if the URL pieces add up */
if (strcmp(postgood, r->uri + (urlen - pglen))) {
return DECLINED;
}
/* url = /correct-url */
url = ap_pstrndup(r->pool, r->uri, (urlen - pglen));
/* Now open the directory and do ourselves a check... */
dirp = ap_popendir(r->pool, good);
if (dirp == NULL) { /* Oops, not a directory... */
return DECLINED;
}
candidates = ap_make_array(r->pool, 2, sizeof(misspelled_file));
dotloc = ap_ind(bad, '.');
if (dotloc == -1) {
dotloc = strlen(bad);
}
while ((dir_entry = readdir(dirp)) != NULL) {
sp_reason q;
/*
* If we end up with a "fixed" URL which is identical to the
* requested one, we must have found a broken symlink or some such.
* Do _not_ try to redirect this, it causes a loop!
*/
if (strcmp(bad, dir_entry->d_name) == 0) {
ap_pclosedir(r->pool, dirp);
return OK;
}
/*
* miscapitalization errors are checked first (like, e.g., lower case
* file, upper case request)
*/
else if (strcasecmp(bad, dir_entry->d_name) == 0) {
misspelled_file *sp_new;
sp_new = (misspelled_file *) ap_push_array(candidates);
sp_new->name = ap_pstrdup(r->pool, dir_entry->d_name);
sp_new->quality = SP_MISCAPITALIZED;
}
/*
* simple typing errors are checked next (like, e.g.,
* missing/extra/transposed char)
*/
else if ((q = spdist(bad, dir_entry->d_name)) != SP_VERYDIFFERENT) {
misspelled_file *sp_new;
sp_new = (misspelled_file *) ap_push_array(candidates);
sp_new->name = ap_pstrdup(r->pool, dir_entry->d_name);
sp_new->quality = q;
}
/*
* The spdist() should have found the majority of the misspelled
* requests. It is of questionable use to continue looking for
* files with the same base name, but potentially of totally wrong
* type (index.html <-> index.db).
* I would propose to not set the WANT_BASENAME_MATCH define.
* 08-Aug-1997 <*****@*****.**>
*
* However, Alexei replied giving some reasons to add it anyway:
* > Oh, by the way, I remembered why having the
* > extension-stripping-and-matching stuff is a good idea:
* >
* > If you're using MultiViews, and have a file named foobar.html,
* > which you refer to as "foobar", and someone tried to access
* > "Foobar", mod_speling won't find it, because it won't find
* > anything matching that spelling. With the extension-munging,
* > it would locate "foobar.html". Not perfect, but I ran into
* > that problem when I first wrote the module.
*/
else {
#ifdef WANT_BASENAME_MATCH
/*
* Okay... we didn't find anything. Now we take out the hard-core
* power tools. There are several cases here. Someone might have
* entered a wrong extension (.htm instead of .html or vice
* versa) or the document could be negotiated. At any rate, now
* we just compare stuff before the first dot. If it matches, we
* figure we got us a match. This can result in wrong things if
* there are files of different content types but the same prefix
* (e.g. foo.gif and foo.html) This code will pick the first one
* it finds. Better than a Not Found, though.
*/
int entloc = ap_ind(dir_entry->d_name, '.');
if (entloc == -1) {
entloc = strlen(dir_entry->d_name);
}
if ((dotloc == entloc)
&& !strncasecmp(bad, dir_entry->d_name, dotloc)) {
misspelled_file *sp_new;
sp_new = (misspelled_file *) ap_push_array(candidates);
sp_new->name = ap_pstrdup(r->pool, dir_entry->d_name);
sp_new->quality = SP_VERYDIFFERENT;
}
#endif
}
}
ap_pclosedir(r->pool, dirp);
if (candidates->nelts != 0) {
/* Wow... we found us a mispelling. Construct a fixed url */
char *nuri;
const char *ref;
misspelled_file *variant = (misspelled_file *) candidates->elts;
int i;
ref = ap_table_get(r->headers_in, "Referer");
qsort((void *) candidates->elts, candidates->nelts,
sizeof(misspelled_file), sort_by_quality);
/*
* Conditions for immediate redirection:
* a) the first candidate was not found by stripping the suffix
* AND b) there exists only one candidate OR the best match is not
* ambiguous
* then return a redirection right away.
*/
if (variant[0].quality != SP_VERYDIFFERENT
&& (candidates->nelts == 1
|| variant[0].quality != variant[1].quality)) {
nuri = ap_escape_uri(r->pool, ap_pstrcat(r->pool, url,
variant[0].name,
r->path_info, NULL));
if (r->parsed_uri.query)
nuri = ap_pstrcat(r->pool, nuri, "?", r->parsed_uri.query, NULL);
ap_table_setn(r->headers_out, "Location",
ap_construct_url(r->pool, nuri, r));
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO | APLOG_INFO, r,
ref ? "Fixed spelling: %s to %s from %s"
: "Fixed spelling: %s to %s",
r->uri, nuri, ref);
return HTTP_MOVED_PERMANENTLY;
}
/*
* Otherwise, a "[300] Multiple Choices" list with the variants is
* returned.
*/
else {
pool *p;
table *notes;
pool *sub_pool;
array_header *t;
array_header *v;
if (r->main == NULL) {
p = r->pool;
notes = r->notes;
}
else {
p = r->main->pool;
notes = r->main->notes;
}
sub_pool = ap_make_sub_pool(p);
t = ap_make_array(sub_pool, candidates->nelts * 8 + 8,
sizeof(char *));
v = ap_make_array(sub_pool, candidates->nelts * 5,
sizeof(char *));
/* Generate the response text. */
*(const char **)ap_push_array(t) =
"The document name you requested (<code>";
*(const char **)ap_push_array(t) = ap_escape_html(sub_pool, r->uri);
*(const char **)ap_push_array(t) =
"</code>) could not be found on this server.\n"
"However, we found documents with names similar "
"to the one you requested.<p>"
"Available documents:\n<ul>\n";
for (i = 0; i < candidates->nelts; ++i) {
char *vuri;
const char *reason;
reason = sp_reason_str[(int) (variant[i].quality)];
/* The format isn't very neat... */
vuri = ap_pstrcat(sub_pool, url, variant[i].name, r->path_info,
(r->parsed_uri.query != NULL) ? "?" : "",
(r->parsed_uri.query != NULL)
? r->parsed_uri.query : "",
NULL);
*(const char **)ap_push_array(v) = "\"";
*(const char **)ap_push_array(v) = ap_escape_uri(sub_pool, vuri);
*(const char **)ap_push_array(v) = "\";\"";
*(const char **)ap_push_array(v) = reason;
*(const char **)ap_push_array(v) = "\"";
*(const char **)ap_push_array(t) = "<li><a href=\"";
*(const char **)ap_push_array(t) = ap_escape_uri(sub_pool, vuri);
*(const char **)ap_push_array(t) = "\">";
*(const char **)ap_push_array(t) = ap_escape_html(sub_pool, vuri);
*(const char **)ap_push_array(t) = "</a> (";
*(const char **)ap_push_array(t) = reason;
*(const char **)ap_push_array(t) = ")\n";
/*
* when we have printed the "close matches" and there are
* more "distant matches" (matched by stripping the suffix),
* then we insert an additional separator text to suggest
* that the user LOOK CLOSELY whether these are really the
* files she wanted.
*/
if (i > 0 && i < candidates->nelts - 1
&& variant[i].quality != SP_VERYDIFFERENT
&& variant[i + 1].quality == SP_VERYDIFFERENT) {
*(const char **)ap_push_array(t) =
"</ul>\nFurthermore, the following related "
"documents were found:\n<ul>\n";
}
}
*(const char **)ap_push_array(t) = "</ul>\n";
/* If we know there was a referring page, add a note: */
if (ref != NULL) {
*(const char **)ap_push_array(t) =
"Please consider informing the owner of the "
"<a href=\"";
*(const char **)ap_push_array(t) = ap_escape_uri(sub_pool, ref);
*(const char **)ap_push_array(t) = "\">referring page</a> "
"about the broken link.\n";
}
/* Pass our table to http_protocol.c (see mod_negotiation): */
ap_table_setn(notes, "variant-list", ap_array_pstrcat(p, t, 0));
ap_table_mergen(r->subprocess_env, "VARIANTS",
ap_array_pstrcat(p, v, ','));
ap_destroy_pool(sub_pool);
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO | APLOG_INFO, r,
ref ? "Spelling fix: %s: %d candidates from %s"
: "Spelling fix: %s: %d candidates",
r->uri, candidates->nelts, ref);
return HTTP_MULTIPLE_CHOICES;
}
}
return OK;
}
/*
* This handles http:// URLs, and other URLs using a remote proxy over http
* If proxyhost is NULL, then contact the server directly, otherwise
* go via the proxy.
* Note that if a proxy is used, then URLs other than http: can be accessed,
* also, if we have trouble which is clearly specific to the proxy, then
* we return DECLINED so that we can try another proxy. (Or the direct
* route.)
*/
int ap_proxy_http_handler(request_rec *r, cache_req *c, char *url,
const char *proxyhost, int proxyport)
{
const char *strp;
char *strp2;
const char *err, *desthost;
int i, j, sock,/* len,*/ backasswards;
table *req_hdrs, *resp_hdrs;
array_header *reqhdrs_arr;
table_entry *reqhdrs_elts;
BUFF *f;
char buffer[HUGE_STRING_LEN];
char portstr[32];
pool *p = r->pool;
int chunked = 0, destport = 0;
char *destportstr = NULL;
const char *urlptr = NULL;
const char *datestr, *urlstr;
struct addrinfo hints, *res, *res0;
int error;
int result, major, minor;
const char *content_length;
const char *peer;
int destportstrtonum;
const char *errstr;
void *sconf = r->server->module_config;
proxy_server_conf *conf =
(proxy_server_conf *)ap_get_module_config(sconf, &proxy_module);
struct noproxy_entry *npent = (struct noproxy_entry *) conf->noproxies->elts;
struct nocache_entry *ncent = (struct nocache_entry *) conf->nocaches->elts;
int nocache = 0;
if (conf->cache.root == NULL)
nocache = 1;
/* We break the URL into host, port, path-search */
urlptr = strstr(url, "://");
if (urlptr == NULL)
return HTTP_BAD_REQUEST;
destport = DEFAULT_HTTP_PORT;
urlptr += 3;
ap_hook_use("ap::mod_proxy::http::handler::set_destport",
AP_HOOK_SIG2(int,ptr),
AP_HOOK_TOPMOST,
&destport, r);
ap_snprintf(portstr, sizeof(portstr), "%d", destport);
destportstr = portstr;
strp = strchr(urlptr, '/');
if (strp == NULL) {
desthost = ap_pstrdup(p, urlptr);
urlptr = "/";
}
else {
char *q = ap_palloc(p, strp - urlptr + 1);
memcpy(q, urlptr, strp - urlptr);
q[strp - urlptr] = '\0';
urlptr = strp;
desthost = q;
}
if (*desthost == '['){
char *u = strrchr(desthost+1, ']');
if (u){
desthost++;
*u = '\0';
if (*(u+1) == ':'){ /* [host]:xx */
strp2 = u+1;
}
else if (*(u+1) == '\0'){ /* [host] */
strp2 = NULL;
}
else
return HTTP_BAD_REQUEST;
}
else
return HTTP_BAD_REQUEST;
}
else
strp2 = strrchr(desthost, ':');
if (strp2 != NULL) {
*(strp2++) = '\0';
if (ap_isdigit(*strp2))
destportstr = strp2;
}
/* Make sure peer is always set to prevent a segfault in the SSL handler */
peer = desthost;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
error = getaddrinfo(desthost, destportstr, &hints, &res0);
if (error && proxyhost == NULL) {
return ap_proxyerror(r, HTTP_INTERNAL_SERVER_ERROR,
gai_strerror(error)); /* give up */
}
/* check if ProxyBlock directive on this host */
for (i = 0; i < conf->noproxies->nelts; i++) {
int fail;
struct sockaddr_in *sin;
fail = 0;
if (npent[i].name != NULL && strstr(desthost, npent[i].name))
fail++;
if (npent[i].name != NULL && strcmp(npent[i].name, "*") == 0)
fail++;
for (res = res0; res; res = res->ai_next) {
switch (res->ai_family) {
case AF_INET:
sin = (struct sockaddr_in *)res->ai_addr;
if (sin->sin_addr.s_addr == npent[i].addr.s_addr)
fail++;
break;
}
}
if (fail) {
if (res0 != NULL)
freeaddrinfo(res0);
return ap_proxyerror(r, HTTP_FORBIDDEN,
"Connect to remote machine blocked");
}
}
if (proxyhost != NULL) {
char pbuf[10];
if (res0 != NULL)
freeaddrinfo(res0);
ap_snprintf(pbuf, sizeof(pbuf), "%d", proxyport);
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
error = getaddrinfo(proxyhost, pbuf, &hints, &res0);
if (error)
return DECLINED; /* try another */
}
/* check if ProxyBlock directive on this host */
for (i = 0; i < conf->noproxies->nelts; i++) {
peer = ap_psprintf(p, "%s:%s", desthost, destportstr);
}
/*
* we have worked out who exactly we are going to connect to, now make
* that connection...
*/
sock = i = -1;
for (res = res0; res; res = res->ai_next) {
sock = ap_psocket(p, res->ai_family, res->ai_socktype,
res->ai_protocol);
if (sock < 0)
continue;
if (conf->recv_buffer_size) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
(const char *)&conf->recv_buffer_size, sizeof(int))
== -1) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
"setsockopt(SO_RCVBUF): Failed to set ProxyReceiveBufferSize, using default");
}
}
i = ap_proxy_doconnect(sock, res->ai_addr, r);
if (i == 0)
break;
ap_pclosesocket(p, sock);
}
freeaddrinfo(res0);
if (i == -1) {
if (proxyhost != NULL)
return DECLINED; /* try again another way */
else
return ap_proxyerror(r, HTTP_BAD_GATEWAY, ap_pstrcat(r->pool,
"Could not connect to remote machine: ",
strerror(errno), NULL));
}
/* record request_time for HTTP/1.1 age calculation */
c->req_time = time(NULL);
/*
* build upstream-request headers by stripping r->headers_in from
* connection specific headers. We must not remove the Connection: header
* from r->headers_in, we still have to react to Connection: close
*/
req_hdrs = ap_copy_table(r->pool, r->headers_in);
ap_proxy_clear_connection(r->pool, req_hdrs);
/*
* At this point, we start sending the HTTP/1.1 request to the remote
* server (proxy or otherwise).
*/
f = ap_bcreate(p, B_RDWR | B_SOCKET);
ap_bpushfd(f, sock, sock);
{
char *errmsg = NULL;
ap_hook_use("ap::mod_proxy::http::handler::new_connection",
AP_HOOK_SIG4(ptr,ptr,ptr,ptr),
AP_HOOK_DECLINE(NULL),
&errmsg, r, f, peer);
if (errmsg != NULL)
return ap_proxyerror(r, HTTP_BAD_GATEWAY, errmsg);
}
ap_hard_timeout("proxy send", r);
ap_bvputs(f, r->method, " ", proxyhost ? url : urlptr, " HTTP/1.1" CRLF,
NULL);
{
int rc = DECLINED;
ap_hook_use("ap::mod_proxy::http::handler::write_host_header",
AP_HOOK_SIG6(int,ptr,ptr,ptr,ptr,ptr),
AP_HOOK_DECLINE(DECLINED),
&rc, r, f, desthost, destportstr, destportstr);
if (rc == DECLINED) {
destportstrtonum = strtonum(destportstr, 0, 65535, &errstr);
if (errstr)
errx(1, "The destination port is %s: %s", errstr, destportstr);
if (destportstr != NULL && destportstrtonum != destport)
ap_bvputs(f, "Host: ", desthost, ":", destportstr, CRLF, NULL);
else
ap_bvputs(f, "Host: ", desthost, CRLF, NULL);
}
}
if (conf->viaopt == via_block) {
/* Block all outgoing Via: headers */
ap_table_unset(req_hdrs, "Via");
}
else if (conf->viaopt != via_off) {
/* Create a "Via:" request header entry and merge it */
i = ap_get_server_port(r);
if (ap_is_default_port(i, r)) {
strlcpy(portstr, "", sizeof(portstr));
}
else {
ap_snprintf(portstr, sizeof portstr, ":%d", i);
}
/* Generate outgoing Via: header with/without server comment: */
ap_table_mergen(req_hdrs, "Via",
(conf->viaopt == via_full)
? ap_psprintf(p, "%d.%d %s%s (%s)",
HTTP_VERSION_MAJOR(r->proto_num),
HTTP_VERSION_MINOR(r->proto_num),
ap_get_server_name(r), portstr,
SERVER_BASEVERSION)
: ap_psprintf(p, "%d.%d %s%s",
HTTP_VERSION_MAJOR(r->proto_num),
HTTP_VERSION_MINOR(r->proto_num),
ap_get_server_name(r), portstr)
);
}
/* the X-* headers are only added if we are a reverse
* proxy, otherwise we would be giving away private information.
*/
if (r->proxyreq == PROXY_PASS) {
const char *buf;
/*
* Add X-Forwarded-For: so that the upstream has a chance to determine,
* where the original request came from.
*/
ap_table_mergen(req_hdrs, "X-Forwarded-For", r->connection->remote_ip);
/* Add X-Forwarded-Host: so that upstream knows what the
* original request hostname was.
*/
if ((buf = ap_table_get(r->headers_in, "Host"))) {
ap_table_mergen(req_hdrs, "X-Forwarded-Host", buf);
}
/* Add X-Forwarded-Server: so that upstream knows what the
* name of this proxy server is (if there are more than one)
* XXX: This duplicates Via: - do we strictly need it?
*/
ap_table_mergen(req_hdrs, "X-Forwarded-Server", r->server->server_hostname);
}
/* we don't yet support keepalives - but we will soon, I promise! */
ap_table_set(req_hdrs, "Connection", "close");
reqhdrs_arr = ap_table_elts(req_hdrs);
reqhdrs_elts = (table_entry *)reqhdrs_arr->elts;
for (i = 0; i < reqhdrs_arr->nelts; i++) {
if (reqhdrs_elts[i].key == NULL || reqhdrs_elts[i].val == NULL
/*
* Clear out hop-by-hop request headers not to send: RFC2616 13.5.1
* says we should strip these headers:
*/
|| !strcasecmp(reqhdrs_elts[i].key, "Host") /* Already sent */
|| !strcasecmp(reqhdrs_elts[i].key, "Keep-Alive")
|| !strcasecmp(reqhdrs_elts[i].key, "TE")
|| !strcasecmp(reqhdrs_elts[i].key, "Trailer")
|| !strcasecmp(reqhdrs_elts[i].key, "Transfer-Encoding")
|| !strcasecmp(reqhdrs_elts[i].key, "Upgrade")
/*
* XXX: @@@ FIXME: "Proxy-Authorization" should *only* be suppressed
* if THIS server requested the authentication, not when a frontend
* proxy requested it!
*
* The solution to this problem is probably to strip out the
* Proxy-Authorisation header in the authorisation code itself, not
* here. This saves us having to signal somehow whether this request
* was authenticated or not.
*/
|| !strcasecmp(reqhdrs_elts[i].key, "Proxy-Authorization"))
continue;
ap_bvputs(f, reqhdrs_elts[i].key, ": ", reqhdrs_elts[i].val, CRLF, NULL);
}
/* the obligatory empty line to mark the end of the headers */
ap_bputs(CRLF, f);
/* and flush the above away */
ap_bflush(f);
/* and kill the send timeout */
ap_kill_timeout(r);
/* read the request data, and pass it to the backend.
* we might encounter a stray 100-continue reponse from a PUT or POST,
* if this happens we ignore the 100 continue status line and read the
* response again.
*/
{
/* send the request data, if any. */
ap_hard_timeout("proxy receive request data", r);
if (ap_should_client_block(r)) {
while ((i = ap_get_client_block(r, buffer, sizeof buffer)) > 0) {
ap_reset_timeout(r);
ap_bwrite(f, buffer, i);
}
}
ap_bflush(f);
ap_kill_timeout(r);
/* then, read a response line */
ap_hard_timeout("proxy receive response status line", r);
result = ap_proxy_read_response_line(f, r, buffer, sizeof(buffer)-1, &backasswards, &major, &minor);
ap_kill_timeout(r);
/* trap any errors */
if (result != OK) {
ap_bclose(f);
return result;
}
/* if this response was 100-continue, a stray response has been caught.
* read the line again for the real response
*/
if (r->status == 100) {
ap_hard_timeout("proxy receive response status line", r);
result = ap_proxy_read_response_line(f, r, buffer, sizeof(buffer)-1, &backasswards, &major, &minor);
ap_kill_timeout(r);
/* trap any errors */
if (result != OK) {
ap_bclose(f);
return result;
}
}
}
/*
* We have our response status line from the convoluted code above,
* now we read the headers to continue.
*/
ap_hard_timeout("proxy receive response headers", r);
/*
* Is it an HTTP/1 response? Do some sanity checks on the response. (This
* is buggy if we ever see an HTTP/1.10)
*/
if (backasswards == 0) {
/* read the response headers. */
/* N.B. for HTTP/1.0 clients, we have to fold line-wrapped headers */
/* Also, take care with headers with multiple occurences. */
resp_hdrs = ap_proxy_read_headers(r, buffer, sizeof(buffer), f);
if (resp_hdrs == NULL) {
ap_log_error(APLOG_MARK, APLOG_WARNING | APLOG_NOERRNO, r->server,
"proxy: Bad HTTP/%d.%d header returned by %s (%s)",
major, minor, r->uri, r->method);
resp_hdrs = ap_make_table(p, 20);
nocache = 1; /* do not cache this broken file */
}
/* handle Via header in the response */
if (conf->viaopt != via_off && conf->viaopt != via_block) {
/* Create a "Via:" response header entry and merge it */
i = ap_get_server_port(r);
if (ap_is_default_port(i, r)) {
strlcpy(portstr, "", sizeof(portstr));
}
else {
ap_snprintf(portstr, sizeof portstr, ":%d", i);
}
ap_table_mergen((table *)resp_hdrs, "Via",
(conf->viaopt == via_full)
? ap_psprintf(p, "%d.%d %s%s (%s)",
major, minor,
ap_get_server_name(r), portstr,
SERVER_BASEVERSION)
: ap_psprintf(p, "%d.%d %s%s",
major, minor,
ap_get_server_name(r), portstr)
);
}
/* is this content chunked? */
chunked = ap_find_last_token(r->pool,
ap_table_get(resp_hdrs, "Transfer-Encoding"),
"chunked");
/* strip hop-by-hop headers defined by Connection and RFC2616 */
ap_proxy_clear_connection(p, resp_hdrs);
content_length = ap_table_get(resp_hdrs, "Content-Length");
if (content_length != NULL) {
c->len = ap_strtol(content_length, NULL, 10);
if (c->len < 0) {
ap_kill_timeout(r);
return ap_proxyerror(r, HTTP_BAD_GATEWAY, ap_pstrcat(r->pool,
"Invalid Content-Length from remote server",
NULL));
}
}
}
else {
/* an http/0.9 response */
/* no headers */
resp_hdrs = ap_make_table(p, 20);
}
ap_kill_timeout(r);
/*
* HTTP/1.1 requires us to accept 3 types of dates, but only generate one
* type
*/
/*
* we SET the dates here, obliterating possible multiple dates, as only
* one of each date makes sense in each response.
*/
if ((datestr = ap_table_get(resp_hdrs, "Date")) != NULL)
ap_table_set(resp_hdrs, "Date", ap_proxy_date_canon(p, datestr));
if ((datestr = ap_table_get(resp_hdrs, "Last-Modified")) != NULL)
ap_table_set(resp_hdrs, "Last-Modified", ap_proxy_date_canon(p, datestr));
if ((datestr = ap_table_get(resp_hdrs, "Expires")) != NULL)
ap_table_set(resp_hdrs, "Expires", ap_proxy_date_canon(p, datestr));
/* handle the ProxyPassReverse mappings */
if ((urlstr = ap_table_get(resp_hdrs, "Location")) != NULL)
ap_table_set(resp_hdrs, "Location", proxy_location_reverse_map(r, urlstr));
if ((urlstr = ap_table_get(resp_hdrs, "URI")) != NULL)
ap_table_set(resp_hdrs, "URI", proxy_location_reverse_map(r, urlstr));
if ((urlstr = ap_table_get(resp_hdrs, "Content-Location")) != NULL)
ap_table_set(resp_hdrs, "Content-Location", proxy_location_reverse_map(r, urlstr));
/* check if NoCache directive on this host */
{
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
if (nocache == 0) {
for (i = 0; i < conf->nocaches->nelts; i++) {
if (ncent[i].name != NULL &&
(ncent[i].name[0] == '*' ||
strstr(desthost, ncent[i].name) != NULL)) {
nocache = 1;
break;
}
switch (res->ai_addr->sa_family) {
case AF_INET:
sin = (struct sockaddr_in *)res->ai_addr;
if (sin->sin_addr.s_addr == ncent[i].addr.s_addr) {
nocache = 1;
break;
}
}
}
/* update the cache file, possibly even fulfilling the request if
* it turns out a conditional allowed us to serve the object from the
* cache...
*/
i = ap_proxy_cache_update(c, resp_hdrs, !backasswards, nocache);
if (i != DECLINED) {
ap_bclose(f);
return i;
}
/* write status line and headers to the cache file */
ap_proxy_write_headers(c, ap_pstrcat(p, "HTTP/1.1 ", r->status_line, NULL), resp_hdrs);
}
}
/* Setup the headers for our client from upstreams response-headers */
ap_proxy_table_replace(r->headers_out, resp_hdrs);
/* Add X-Cache header - be careful not to obliterate any upstream headers */
ap_table_mergen(r->headers_out, "X-Cache",
ap_pstrcat(r->pool, "MISS from ",
ap_get_server_name(r), NULL));
/* The Content-Type of this response is the upstream one. */
r->content_type = ap_table_get(r->headers_out, "Content-Type");
ap_log_error(APLOG_MARK, APLOG_DEBUG | APLOG_NOERRNO, r->server, "Content-Type: %s", r->content_type);
/* finally output the headers to the client */
ap_send_http_header(r);
/*
* Is it an HTTP/0.9 respose? If so, send the extra data we read from
* upstream as the start of the reponse to client
*/
/* FIXME: This code is broken: we try and write a buffer and length that
* were never intelligently initialised. Rather have a bit of broken protocol
* handling for now than broken code.
*/
/*
if (backasswards) {
ap_hard_timeout("proxy send assbackward", r);
ap_bwrite(r->connection->client, buffer, len);
if (c != NULL && c->fp != NULL && ap_bwrite(c->fp, buffer, len) != len) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, c->req,
"proxy: error writing extra data to %s", c->tempfile);
c = ap_proxy_cache_error(c);
}
ap_kill_timeout(r);
}
*/
/* send body */
/* if header only, then cache will be NULL */
/* HTTP/1.0 tells us to read to EOF, rather than content-length bytes */
/* XXX CHANGEME: We want to eventually support keepalives, which means
* we must read content-length bytes... */
if (!r->header_only) {
/* we need to set this for ap_proxy_send_fb()... */
c->cache_completion = conf->cache.cache_completion;
/* XXX CHECKME: c->len should be the expected content length, or -1 if the
* content length is not known. We need to make 100% sure c->len is always
* set correctly before we get here to correctly do keepalive.
*/
ap_proxy_send_fb(f, r, c, c->len, 0, chunked, conf->io_buffer_size);
}
/* ap_proxy_send_fb() closes the socket f for us */
ap_proxy_cache_tidy(c);
ap_proxy_garbage_coll(r);
return OK;
}