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lighttpd1.4/src/http-header-glue.c

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#include "first.h"
#include "base.h"
#include "array.h"
#include "buffer.h"
#include "fdevent.h"
#include "log.h"
#include "etag.h"
#include "http_chunk.h"
#include "http_header.h"
#include "response.h"
#include "sock_addr.h"
#include "stat_cache.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include "sys-strings.h"
#include "sys-socket.h"
#include <unistd.h>
int http_response_buffer_append_authority(server *srv, connection *con, buffer *o) {
if (!buffer_string_is_empty(con->uri.authority)) {
buffer_append_string_buffer(o, con->uri.authority);
} else {
/* get the name of the currently connected socket */
sock_addr our_addr;
socklen_t our_addr_len;
our_addr.plain.sa_family = 0;
our_addr_len = sizeof(our_addr);
if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len)
|| our_addr_len > (socklen_t)sizeof(our_addr)) {
con->http_status = 500;
log_error_write(srv, __FILE__, __LINE__, "ss",
"can't get sockname", strerror(errno));
return -1;
}
if (our_addr.plain.sa_family == AF_INET
&& our_addr.ipv4.sin_addr.s_addr == htonl(INADDR_LOOPBACK)) {
static char lhost[32];
static size_t lhost_len = 0;
if (0 != lhost_len) {
buffer_append_string_len(o, lhost, lhost_len);
}
else {
size_t olen = buffer_string_length(o);
if (0 == sock_addr_nameinfo_append_buffer(srv, o, &our_addr)) {
lhost_len = buffer_string_length(o) - olen;
if (lhost_len < sizeof(lhost)) {
memcpy(lhost, o->ptr+olen, lhost_len+1); /*(+1 for '\0')*/
}
else {
lhost_len = 0;
}
}
else {
lhost_len = sizeof("localhost")-1;
memcpy(lhost, "localhost", lhost_len+1); /*(+1 for '\0')*/
buffer_append_string_len(o, lhost, lhost_len);
}
}
} else if (!buffer_string_is_empty(con->server_name)) {
buffer_append_string_buffer(o, con->server_name);
} else
/* Lookup name: secondly try to get hostname for bind address */
if (0 != sock_addr_nameinfo_append_buffer(srv, o, &our_addr)) {
con->http_status = 500;
return -1;
}
{
unsigned short listen_port = sock_addr_get_port(&our_addr);
unsigned short default_port = 80;
if (buffer_is_equal_string(con->uri.scheme, CONST_STR_LEN("https"))) {
default_port = 443;
}
if (0 == listen_port) listen_port = srv->srvconf.port;
if (default_port != listen_port) {
buffer_append_string_len(o, CONST_STR_LEN(":"));
buffer_append_int(o, listen_port);
}
}
}
return 0;
}
int http_response_redirect_to_directory(server *srv, connection *con, int status) {
buffer *o = srv->tmp_buf;
buffer_copy_buffer(o, con->uri.scheme);
buffer_append_string_len(o, CONST_STR_LEN("://"));
if (0 != http_response_buffer_append_authority(srv, con, o)) {
return -1;
}
buffer_append_string_encoded(o, CONST_BUF_LEN(con->uri.path), ENCODING_REL_URI);
buffer_append_string_len(o, CONST_STR_LEN("/"));
if (!buffer_string_is_empty(con->uri.query)) {
buffer_append_string_len(o, CONST_STR_LEN("?"));
buffer_append_string_buffer(o, con->uri.query);
}
if (status >= 300) {
http_header_response_set(con, HTTP_HEADER_LOCATION, CONST_STR_LEN("Location"), CONST_BUF_LEN(o));
con->http_status = status;
con->file_finished = 1;
}
else {
http_header_response_set(con, HTTP_HEADER_CONTENT_LOCATION, CONST_STR_LEN("Content-Location"), CONST_BUF_LEN(o));
}
return 0;
}
buffer * strftime_cache_get(server *srv, time_t last_mod) {
static int i;
struct tm *tm;
for (int j = 0; j < FILE_CACHE_MAX; ++j) {
if (srv->mtime_cache[j].mtime == last_mod)
return srv->mtime_cache[j].str; /* found cache-entry */
}
if (++i == FILE_CACHE_MAX) {
i = 0;
}
srv->mtime_cache[i].mtime = last_mod;
tm = gmtime(&(srv->mtime_cache[i].mtime));
buffer_clear(srv->mtime_cache[i].str);
buffer_append_strftime(srv->mtime_cache[i].str, "%a, %d %b %Y %H:%M:%S GMT", tm);
return srv->mtime_cache[i].str;
}
int http_response_handle_cachable(server *srv, connection *con, buffer *mtime) {
buffer *vb;
int head_or_get =
( HTTP_METHOD_GET == con->request.http_method
|| HTTP_METHOD_HEAD == con->request.http_method);
UNUSED(srv);
/*
* 14.26 If-None-Match
* [...]
* If none of the entity tags match, then the server MAY perform the
* requested method as if the If-None-Match header field did not exist,
* but MUST also ignore any If-Modified-Since header field(s) in the
* request. That is, if no entity tags match, then the server MUST NOT
* return a 304 (Not Modified) response.
*/
if ((vb = http_header_request_get(con, HTTP_HEADER_IF_NONE_MATCH, CONST_STR_LEN("If-None-Match")))) {
/* use strong etag checking for now: weak comparison must not be used
* for ranged requests
*/
if (etag_is_equal(con->physical.etag, vb->ptr, 0)) {
if (head_or_get) {
con->http_status = 304;
return HANDLER_FINISHED;
} else {
con->http_status = 412;
con->mode = DIRECT;
return HANDLER_FINISHED;
}
}
} else if (head_or_get
&& (vb = http_header_request_get(con, HTTP_HEADER_IF_MODIFIED_SINCE, CONST_STR_LEN("If-Modified-Since")))) {
/* last-modified handling */
size_t used_len;
char *semicolon;
if (NULL == (semicolon = strchr(vb->ptr, ';'))) {
used_len = buffer_string_length(vb);
} else {
used_len = semicolon - vb->ptr;
}
if (buffer_is_equal_string(mtime, vb->ptr, used_len)) {
if ('\0' == mtime->ptr[used_len]) con->http_status = 304;
return HANDLER_FINISHED;
} else {
char buf[sizeof("Sat, 23 Jul 2005 21:20:01 GMT")];
time_t t_header, t_file;
struct tm tm;
/* convert to timestamp */
if (used_len >= sizeof(buf)) return HANDLER_GO_ON;
memcpy(buf, vb->ptr, used_len);
buf[used_len] = '\0';
if (NULL == strptime(buf, "%a, %d %b %Y %H:%M:%S GMT", &tm)) {
/**
* parsing failed, let's get out of here
*/
return HANDLER_GO_ON;
}
tm.tm_isdst = 0;
t_header = mktime(&tm);
strptime(mtime->ptr, "%a, %d %b %Y %H:%M:%S GMT", &tm);
tm.tm_isdst = 0;
t_file = mktime(&tm);
if (t_file > t_header) return HANDLER_GO_ON;
con->http_status = 304;
return HANDLER_FINISHED;
}
}
return HANDLER_GO_ON;
}
void http_response_body_clear (connection *con, int preserve_length) {
con->response.send_chunked = 0;
if (con->response.htags & HTTP_HEADER_TRANSFER_ENCODING) {
http_header_response_unset(con, HTTP_HEADER_TRANSFER_ENCODING, CONST_STR_LEN("Transfer-Encoding"));
}
if (!preserve_length) { /* preserve for HEAD responses and no-content responses (204, 205, 304) */
con->response.content_length = -1;
if (con->response.htags & HTTP_HEADER_CONTENT_LENGTH) {
http_header_response_unset(con, HTTP_HEADER_CONTENT_LENGTH, CONST_STR_LEN("Content-Length"));
}
}
chunkqueue_reset(con->write_queue);
}
static int http_response_parse_range(server *srv, connection *con, buffer *path, stat_cache_entry *sce, const char *range) {
int multipart = 0;
int error;
off_t start, end;
const char *s, *minus;
static const char boundary[] = "fkj49sn38dcn3";
buffer *content_type = http_header_response_get(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"));
start = 0;
end = sce->st.st_size - 1;
con->response.content_length = 0;
for (s = range, error = 0;
!error && *s && NULL != (minus = strchr(s, '-')); ) {
char *err;
off_t la = 0, le;
*((const char **)&err) = s; /*(quiet clang --analyze)*/
if (s != minus) {
la = strtoll(s, &err, 10);
if (err != minus) {
/* should not have multiple range-unit in Range, but
* handle just in case multiple Range headers merged */
while (*s == ' ' || *s == '\t') ++s;
if (0 != strncmp(s, "bytes=", 6)) return -1;
s += 6;
if (s != minus) {
la = strtoll(s, &err, 10);
if (err != minus) return -1;
}
}
}
if (s == minus) {
/* -<stop> */
le = strtoll(s, &err, 10);
if (le == 0) {
/* RFC 2616 - 14.35.1 */
con->http_status = 416;
error = 1;
} else if (*err == '\0') {
/* end */
s = err;
end = sce->st.st_size - 1;
start = sce->st.st_size + le;
} else if (*err == ',') {
multipart = 1;
s = err + 1;
end = sce->st.st_size - 1;
start = sce->st.st_size + le;
} else {
error = 1;
}
} else if (*(minus+1) == '\0' || *(minus+1) == ',') {
/* <start>- */
/* ok */
if (*(err + 1) == '\0') {
s = err + 1;
end = sce->st.st_size - 1;
start = la;
} else if (*(err + 1) == ',') {
multipart = 1;
s = err + 2;
end = sce->st.st_size - 1;
start = la;
} else {
error = 1;
}
} else {
/* <start>-<stop> */
le = strtoll(minus+1, &err, 10);
/* RFC 2616 - 14.35.1 */
if (la > le) {
error = 1;
}
if (*err == '\0') {
/* ok, end*/
s = err;
end = le;
start = la;
} else if (*err == ',') {
multipart = 1;
s = err + 1;
end = le;
start = la;
} else {
/* error */
error = 1;
}
}
if (!error) {
if (start < 0) start = 0;
/* RFC 2616 - 14.35.1 */
if (end > sce->st.st_size - 1) end = sce->st.st_size - 1;
if (start > sce->st.st_size - 1) {
error = 1;
con->http_status = 416;
}
}
if (!error) {
if (multipart) {
/* write boundary-header */
buffer *b = srv->tmp_buf;
buffer_copy_string_len(b, CONST_STR_LEN("\r\n--"));
buffer_append_string_len(b, boundary, sizeof(boundary)-1);
/* write Content-Range */
buffer_append_string_len(b, CONST_STR_LEN("\r\nContent-Range: bytes "));
buffer_append_int(b, start);
buffer_append_string_len(b, CONST_STR_LEN("-"));
buffer_append_int(b, end);
buffer_append_string_len(b, CONST_STR_LEN("/"));
buffer_append_int(b, sce->st.st_size);
if (content_type) {
buffer_append_string_len(b, CONST_STR_LEN("\r\nContent-Type: "));
buffer_append_string_buffer(b, content_type);
}
/* write END-OF-HEADER */
buffer_append_string_len(b, CONST_STR_LEN("\r\n\r\n"));
con->response.content_length += buffer_string_length(b);
chunkqueue_append_mem(con->write_queue, CONST_BUF_LEN(b));
}
chunkqueue_append_file(con->write_queue, path, start, end - start + 1);
con->response.content_length += end - start + 1;
}
}
/* something went wrong */
if (error) return -1;
if (multipart) {
/* add boundary end */
buffer *b = srv->tmp_buf;
buffer_copy_string_len(b, "\r\n--", 4);
buffer_append_string_len(b, boundary, sizeof(boundary)-1);
buffer_append_string_len(b, "--\r\n", 4);
con->response.content_length += buffer_string_length(b);
chunkqueue_append_mem(con->write_queue, CONST_BUF_LEN(b));
/* set header-fields */
buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("multipart/byteranges; boundary="));
buffer_append_string_len(srv->tmp_buf, boundary, sizeof(boundary)-1);
/* overwrite content-type */
http_header_response_set(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(srv->tmp_buf));
} else {
/* add Content-Range-header */
buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("bytes "));
buffer_append_int(srv->tmp_buf, start);
buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("-"));
buffer_append_int(srv->tmp_buf, end);
buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("/"));
buffer_append_int(srv->tmp_buf, sce->st.st_size);
http_header_response_set(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Content-Range"), CONST_BUF_LEN(srv->tmp_buf));
}
/* ok, the file is set-up */
return 0;
}
void http_response_send_file (server *srv, connection *con, buffer *path) {
stat_cache_entry *sce = NULL;
buffer *mtime = NULL;
buffer *vb;
int allow_caching = (0 == con->http_status || 200 == con->http_status);
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, path, &sce)) {
con->http_status = (errno == ENOENT) ? 404 : 403;
log_error_write(srv, __FILE__, __LINE__, "sbsb",
"not a regular file:", con->uri.path,
"->", path);
return;
}
/* we only handline regular files */
#ifdef HAVE_LSTAT
if ((sce->is_symlink == 1) && !con->conf.follow_symlink) {
con->http_status = 403;
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "s", "-- access denied due symlink restriction");
log_error_write(srv, __FILE__, __LINE__, "sb", "Path :", path);
}
return;
}
#endif
if (!S_ISREG(sce->st.st_mode)) {
con->http_status = 403;
if (con->conf.log_file_not_found) {
log_error_write(srv, __FILE__, __LINE__, "sbsb",
"not a regular file:", con->uri.path,
"->", sce->name);
}
return;
}
/* mod_compress might set several data directly, don't overwrite them */
/* set response content-type, if not set already */
if (NULL == http_header_response_get(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"))) {
stat_cache_content_type_get(srv, con, path, sce);
if (buffer_string_is_empty(sce->content_type)) {
/* we are setting application/octet-stream, but also announce that
* this header field might change in the seconds few requests
*
* This should fix the aggressive caching of FF and the script download
* seen by the first installations
*/
http_header_response_set(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("application/octet-stream"));
allow_caching = 0;
} else {
http_header_response_set(con, HTTP_HEADER_CONTENT_TYPE, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type));
}
}
if (con->conf.range_requests) {
http_header_response_append(con, HTTP_HEADER_OTHER, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes"));
}
if (allow_caching) {
if (con->etag_flags != 0 && !buffer_string_is_empty(stat_cache_etag_get(sce, con->etag_flags))) {
if (NULL == http_header_response_get(con, HTTP_HEADER_ETAG, CONST_STR_LEN("ETag"))) {
/* generate e-tag */
etag_mutate(con->physical.etag, sce->etag);
http_header_response_set(con, HTTP_HEADER_ETAG, CONST_STR_LEN("ETag"), CONST_BUF_LEN(con->physical.etag));
}
}
/* prepare header */
if (NULL == (mtime = http_header_response_get(con, HTTP_HEADER_LAST_MODIFIED, CONST_STR_LEN("Last-Modified")))) {
mtime = strftime_cache_get(srv, sce->st.st_mtime);
http_header_response_set(con, HTTP_HEADER_LAST_MODIFIED, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
}
if (HANDLER_FINISHED == http_response_handle_cachable(srv, con, mtime)) {
return;
}
}
if (con->conf.range_requests
&& (200 == con->http_status || 0 == con->http_status)
&& NULL != (vb = http_header_request_get(con, HTTP_HEADER_RANGE, CONST_STR_LEN("Range")))
&& NULL == http_header_response_get(con, HTTP_HEADER_CONTENT_ENCODING, CONST_STR_LEN("Content-Encoding"))) {
buffer *range = vb;
int do_range_request = 1;
/* check if we have a conditional GET */
if (NULL != (vb = http_header_request_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("If-Range")))) {
/* if the value is the same as our ETag, we do a Range-request,
* otherwise a full 200 */
if (vb->ptr[0] == '"') {
/**
* client wants a ETag
*/
if (!con->physical.etag) {
do_range_request = 0;
} else if (!buffer_is_equal(vb, con->physical.etag)) {
do_range_request = 0;
}
} else if (!mtime) {
/**
* we don't have a Last-Modified and can match the If-Range:
*
* sending all
*/
do_range_request = 0;
} else if (!buffer_is_equal(vb, mtime)) {
do_range_request = 0;
}
}
if (do_range_request
&& !buffer_string_is_empty(range)
&& 0 == strncmp(range->ptr, "bytes=", 6)) {
/* support only "bytes" byte-unit */
/* content prepared, I'm done */
con->file_finished = 1;
if (0 == http_response_parse_range(srv, con, path, sce, range->ptr+6)) {
con->http_status = 206;
}
return;
}
}
/* if we are still here, prepare body */
/* we add it here for all requests
* the HEAD request will drop it afterwards again
*/
if (0 == sce->st.st_size || 0 == http_chunk_append_file(srv, con, path)) {
con->http_status = 200;
con->file_finished = 1;
} else {
con->http_status = 403;
}
}
static void http_response_xsendfile (server *srv, connection *con, buffer *path, const array *xdocroot) {
const int status = con->http_status;
int valid = 1;
/* reset Content-Length, if set by backend
* Content-Length might later be set to size of X-Sendfile static file,
* determined by open(), fstat() to reduces race conditions if the file
* is modified between stat() (stat_cache_get_entry()) and open(). */
if (con->response.htags & HTTP_HEADER_CONTENT_LENGTH) {
http_header_response_unset(con, HTTP_HEADER_CONTENT_LENGTH, CONST_STR_LEN("Content-Length"));
con->response.content_length = -1;
}
buffer_urldecode_path(path);
if (!buffer_is_valid_UTF8(path)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"X-Sendfile invalid UTF-8 after url-decode:", path);
if (con->http_status < 400) {
con->http_status = 502;
con->mode = DIRECT;
}
return;
}
buffer_path_simplify(path, path);
if (con->conf.force_lowercase_filenames) {
buffer_to_lower(path);
}
/* check that path is under xdocroot(s)
* - xdocroot should have trailing slash appended at config time
* - con->conf.force_lowercase_filenames is not a server-wide setting,
* and so can not be definitively applied to xdocroot at config time*/
if (xdocroot->used) {
size_t i, xlen = buffer_string_length(path);
for (i = 0; i < xdocroot->used; ++i) {
data_string *ds = (data_string *)xdocroot->data[i];
size_t dlen = buffer_string_length(ds->value);
if (dlen <= xlen
&& (!con->conf.force_lowercase_filenames
? 0 == memcmp(path->ptr, ds->value->ptr, dlen)
: 0 == strncasecmp(path->ptr, ds->value->ptr, dlen))) {
break;
}
}
if (i == xdocroot->used) {
log_error_write(srv, __FILE__, __LINE__, "SBs",
"X-Sendfile (", path,
") not under configured x-sendfile-docroot(s)");
con->http_status = 403;
valid = 0;
}
}
if (valid) http_response_send_file(srv, con, path);
if (con->http_status >= 400 && status < 300) {
con->mode = DIRECT;
} else if (0 != status && 200 != status) {
con->http_status = status;
}
}
static void http_response_xsendfile2(server *srv, connection *con, const buffer *value, const array *xdocroot) {
const char *pos = value->ptr;
buffer *b = srv->tmp_buf;
const int status = con->http_status;
/* reset Content-Length, if set by backend */
if (con->response.htags & HTTP_HEADER_CONTENT_LENGTH) {
http_header_response_unset(con, HTTP_HEADER_CONTENT_LENGTH, CONST_STR_LEN("Content-Length"));
con->response.content_length = -1;
}
while (*pos) {
const char *filename, *range;
stat_cache_entry *sce;
off_t begin_range, end_range, range_len;
while (' ' == *pos) pos++;
if (!*pos) break;
filename = pos;
if (NULL == (range = strchr(pos, ' '))) {
/* missing range */
log_error_write(srv, __FILE__, __LINE__, "ss",
"Couldn't find range after filename:", filename);
con->http_status = 502;
break;
}
buffer_copy_string_len(b, filename, range - filename);
/* find end of range */
for (pos = ++range; *pos && *pos != ' ' && *pos != ','; pos++) ;
buffer_urldecode_path(b);
if (!buffer_is_valid_UTF8(b)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"X-Sendfile2 invalid UTF-8 after url-decode:", b);
con->http_status = 502;
break;
}
buffer_path_simplify(b, b);
if (con->conf.force_lowercase_filenames) {
buffer_to_lower(b);
}
if (xdocroot->used) {
size_t i, xlen = buffer_string_length(b);
for (i = 0; i < xdocroot->used; ++i) {
data_string *ds = (data_string *)xdocroot->data[i];
size_t dlen = buffer_string_length(ds->value);
if (dlen <= xlen
&& (!con->conf.force_lowercase_filenames
? 0 == memcmp(b->ptr, ds->value->ptr, dlen)
: 0 == strncasecmp(b->ptr, ds->value->ptr, dlen))) {
break;
}
}
if (i == xdocroot->used) {
log_error_write(srv, __FILE__, __LINE__, "SBs",
"X-Sendfile2 (", b,
") not under configured x-sendfile-docroot(s)");
con->http_status = 403;
break;
}
}
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, b, &sce)) {
log_error_write(srv, __FILE__, __LINE__, "sb", "send-file error: "
"couldn't get stat_cache entry for X-Sendfile2:",
b);
con->http_status = 404;
break;
} else if (!S_ISREG(sce->st.st_mode)) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"send-file error: wrong filetype for X-Sendfile2:",
b);
con->http_status = 502;
break;
}
/* found the file */
/* parse range */
end_range = sce->st.st_size - 1;
{
char *rpos = NULL;
errno = 0;
begin_range = strtoll(range, &rpos, 10);
if (errno != 0 || begin_range < 0 || rpos == range)
goto range_failed;
if ('-' != *rpos++) goto range_failed;
if (rpos != pos) {
range = rpos;
end_range = strtoll(range, &rpos, 10);
if (errno != 0 || end_range < 0 || rpos == range)
goto range_failed;
}
if (rpos != pos) goto range_failed;
goto range_success;
range_failed:
log_error_write(srv, __FILE__, __LINE__, "ss",
"Couldn't decode range after filename:", filename);
con->http_status = 502;
break;
range_success: ;
}
/* no parameters accepted */
while (*pos == ' ') pos++;
if (*pos != '\0' && *pos != ',') {
con->http_status = 502;
break;
}
range_len = end_range - begin_range + 1;
if (range_len < 0) {
con->http_status = 502;
break;
}
if (range_len != 0) {
if (0 != http_chunk_append_file_range(srv, con, b,
begin_range, range_len)) {
con->http_status = 502;
break;
}
}
if (*pos == ',') pos++;
}
if (con->http_status >= 400 && status < 300) {
con->mode = DIRECT;
} else if (0 != status && 200 != status) {
con->http_status = status;
}
}
void http_response_backend_error (server *srv, connection *con) {
UNUSED(srv);
if (con->file_started) {
/*(response might have been already started, kill the connection)*/
/*(mode == DIRECT to avoid later call to http_response_backend_done())*/
con->mode = DIRECT; /*(avoid sending final chunked block)*/
con->keep_alive = 0; /*(no keep-alive; final chunked block not sent)*/
con->file_finished = 1;
} /*(else error status set later by http_response_backend_done())*/
}
void http_response_backend_done (server *srv, connection *con) {
/* (not CON_STATE_ERROR and not CON_STATE_RESPONSE_END,
* i.e. not called from handle_connection_close or connection_reset
* hooks, except maybe from errdoc handler, which later resets state)*/
switch (con->state) {
case CON_STATE_HANDLE_REQUEST:
case CON_STATE_READ_POST:
if (!con->file_started) {
/* Send an error if we haven't sent any data yet */
con->http_status = 500;
con->mode = DIRECT;
break;
} /* else fall through */
case CON_STATE_WRITE:
if (!con->file_finished) {
http_chunk_close(srv, con);
con->file_finished = 1;
}
default:
break;
}
}
void http_response_upgrade_read_body_unknown(server *srv, connection *con) {
/* act as transparent proxy */
UNUSED(srv);
if (!(con->conf.stream_request_body & FDEVENT_STREAM_REQUEST))
con->conf.stream_request_body |=
(FDEVENT_STREAM_REQUEST_BUFMIN | FDEVENT_STREAM_REQUEST);
if (!(con->conf.stream_response_body & FDEVENT_STREAM_RESPONSE))
con->conf.stream_response_body |=
(FDEVENT_STREAM_RESPONSE_BUFMIN | FDEVENT_STREAM_RESPONSE);
con->conf.stream_request_body |= FDEVENT_STREAM_REQUEST_POLLIN;
con->request.content_length = -2;
con->keep_alive = 0;
}
static handler_t http_response_process_local_redir(server *srv, connection *con, size_t blen) {
/* [RFC3875] The Common Gateway Interface (CGI) Version 1.1
* [RFC3875] 6.2.2 Local Redirect Response
*
* The CGI script can return a URI path and query-string
* ('local-pathquery') for a local resource in a Location header field.
* This indicates to the server that it should reprocess the request
* using the path specified.
*
* local-redir-response = local-Location NL
*
* The script MUST NOT return any other header fields or a message-body,
* and the server MUST generate the response that it would have produced
* in response to a request containing the URL
*
* scheme "://" server-name ":" server-port local-pathquery
*
* (Might not have begun to receive body yet, but do skip local-redir
* if we already have started receiving a response body (blen > 0))
* (Also, while not required by the RFC, do not send local-redir back
* to same URL, since CGI should have handled it internally if it
* really wanted to do that internally)
*/
/* con->http_status >= 300 && con->http_status < 400) */
size_t ulen = buffer_string_length(con->uri.path);
buffer *vb = http_header_response_get(con, HTTP_HEADER_LOCATION, CONST_STR_LEN("Location"));
if (NULL != vb
&& vb->ptr[0] == '/'
&& (0 != strncmp(vb->ptr, con->uri.path->ptr, ulen)
|| ( vb->ptr[ulen] != '\0'
&& vb->ptr[ulen] != '/'
&& vb->ptr[ulen] != '?'))
&& 0 == blen
&& !(con->response.htags & HTTP_HEADER_STATUS) /*no "Status" or NPH response*/
&& 1 == con->response.headers->used) {
if (++con->loops_per_request > 5) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"too many internal loops while processing request:",
con->request.orig_uri);
con->http_status = 500; /* Internal Server Error */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
buffer_copy_buffer(con->request.uri, vb);
if (con->request.content_length) {
if (con->request.content_length
!= con->request_content_queue->bytes_in) {
con->keep_alive = 0;
}
con->request.content_length = 0;
chunkqueue_reset(con->request_content_queue);
}
if (con->http_status != 307 && con->http_status != 308) {
/* Note: request body (if any) sent to initial dynamic handler
* and is not available to the internal redirect */
con->request.http_method = HTTP_METHOD_GET;
}
/*(caller must reset request as follows)*/
/*connection_response_reset(srv, con);*/ /*(sets con->http_status = 0)*/
/*plugins_call_connection_reset(srv, con);*/
return HANDLER_COMEBACK;
}
return HANDLER_GO_ON;
}
static int http_response_process_headers(server *srv, connection *con, http_response_opts *opts, buffer *hdrs) {
char *ns;
const char *s;
int line = 0;
int status_is_set = 0;
for (s = hdrs->ptr; NULL != (ns = strchr(s, '\n')); s = ns + 1, ++line) {
const char *key, *value;
int key_len;
enum http_header_e id;
/* strip the \n */
ns[0] = '\0';
if (ns > s && ns[-1] == '\r') ns[-1] = '\0';
if (0 == line && 0 == strncmp(s, "HTTP/1.", 7)) {
/* non-parsed headers ... we parse them anyway */
if ((s[7] == '1' || s[7] == '0') && s[8] == ' ') {
/* after the space should be a status code for us */
int status = strtol(s+9, NULL, 10);
if (status >= 100 && status < 1000) {
status_is_set = 1;
con->response.htags |= HTTP_HEADER_STATUS;
con->http_status = status;
} /* else we expected 3 digits and didn't get them */
}
if (0 == con->http_status) {
log_error_write(srv, __FILE__, __LINE__, "ss",
"invalid HTTP status line:", s);
con->http_status = 502; /* Bad Gateway */
con->mode = DIRECT;
return -1;
}
continue;
}
/* parse the headers */
key = s;
if (NULL == (value = strchr(s, ':'))) {
/* we expect: "<key>: <value>\r\n" */
continue;
}
key_len = value - key;
do { ++value; } while (*value == ' ' || *value == '\t'); /* skip LWS */
id = http_header_hkey_get(key, key_len);
if (opts->authorizer) {
if (0 == con->http_status || 200 == con->http_status) {
if (id == HTTP_HEADER_STATUS) {
int status = strtol(value, NULL, 10);
if (status >= 100 && status < 1000) {
con->http_status = status;
} else {
con->http_status = 502; /* Bad Gateway */
break;
}
} else if (id == HTTP_HEADER_OTHER && key_len > 9
&& 0==strncasecmp(key, CONST_STR_LEN("Variable-"))) {
http_header_env_append(con, key + 9, key_len - 9, value, strlen(value));
}
continue;
}
}
switch (id) {
case HTTP_HEADER_STATUS:
{
int status;
if (opts->backend == BACKEND_PROXY) break; /*(pass w/o parse)*/
status = strtol(value, NULL, 10);
if (status >= 100 && status < 1000) {
con->http_status = status;
status_is_set = 1;
} else {
con->http_status = 502;
con->mode = DIRECT;
}
continue; /* do not send Status to client */
}
break;
case HTTP_HEADER_UPGRADE:
/*(technically, should also verify Connection: upgrade)*/
/*(flag only for mod_proxy and mod_cgi (for now))*/
if (opts->backend != BACKEND_PROXY
&& opts->backend != BACKEND_CGI) {
id = HTTP_HEADER_OTHER;
}
break;
case HTTP_HEADER_CONNECTION:
if (opts->backend == BACKEND_PROXY) continue;
/*(should parse for tokens and do case-insensitive match for "close"
* but this is an imperfect though simplistic attempt to honor
* backend request to close)*/
if (NULL != strstr(value, "lose")) con->keep_alive = 0;
break;
case HTTP_HEADER_CONTENT_LENGTH:
con->response.content_length = strtoul(value, NULL, 10);
break;
case HTTP_HEADER_TRANSFER_ENCODING:
if (opts->backend == BACKEND_PROXY) {
log_error_write(srv, __FILE__, __LINE__, "s",
"proxy backend sent invalid response header "
"(Transfer-Encoding) to HTTP/1.0 request");
con->http_status = 502; /* Bad Gateway */
con->mode = DIRECT;
return -1;
}
break;
default:
break;
}
http_header_response_insert(con, id, key, key_len, value, strlen(value));
}
/* CGI/1.1 rev 03 - 7.2.1.2 */
/* (proxy requires Status-Line, so never true for proxy)*/
if (!status_is_set && (con->response.htags & HTTP_HEADER_LOCATION)) {
con->http_status = 302;
}
return 0;
}
handler_t http_response_parse_headers(server *srv, connection *con, http_response_opts *opts, buffer *b) {
/**
* possible formats of response headers:
*
* proxy or NPH (non-parsed headers):
*
* HTTP/1.0 200 Ok\n
* Header: Value\n
* \n
*
* CGI:
*
* Header: Value\n
* Status: 200\n
* \n
*
* and different mixes of \n and \r\n combinations
*
* Some users also forget about CGI and just send a response
* and hope we handle it. No headers, no header-content separator
*/
int is_nph = (0 == strncmp(b->ptr, "HTTP/1.", 7)); /*nph (non-parsed hdrs)*/
int is_header_end = 0;
size_t last_eol = 0;
size_t i = 0, header_len = buffer_string_length(b);
const char *bstart;
size_t blen;
if (b->ptr[0] == '\n' || (b->ptr[0] == '\r' && b->ptr[1] == '\n')) {
/* no HTTP headers */
i = (b->ptr[0] == '\n') ? 0 : 1;
is_header_end = 1;
} else if (is_nph || b->ptr[(i = strcspn(b->ptr, ":\n"))] == ':') {
/* HTTP headers */
++i;
for (char *c; NULL != (c = strchr(b->ptr+i, '\n')); ++i) {
i = (uintptr_t)(c - b->ptr);
/**
* check if we saw a \n(\r)?\n sequence
*/
if (last_eol > 0 &&
((i - last_eol == 1) ||
(i - last_eol == 2 && b->ptr[i - 1] == '\r'))) {
is_header_end = 1;
break;
}
last_eol = i;
}
} else if (i == header_len) { /* (no newline yet; partial header line?) */
} else if (opts->backend == BACKEND_CGI) {
/* no HTTP headers, but a body (special-case for CGI compat) */
/* no colon found; does not appear to be HTTP headers */
if (0 != http_chunk_append_buffer(srv, con, b)) {
return HANDLER_ERROR;
}
con->http_status = 200; /* OK */
con->file_started = 1;
return HANDLER_GO_ON;
} else {
/* invalid response headers */
con->http_status = 502; /* Bad Gateway */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
if (!is_header_end) {
/*(reuse MAX_HTTP_REQUEST_HEADER as max size
* for response headers from backends)*/
if (header_len > MAX_HTTP_REQUEST_HEADER) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"response headers too large for", con->uri.path);
con->http_status = 502; /* Bad Gateway */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
return HANDLER_GO_ON;
}
/* the body starts after the EOL */
bstart = b->ptr + (i + 1);
blen = header_len - (i + 1);
/* strip the last \r?\n */
if (i > 0 && (b->ptr[i - 1] == '\r')) {
i--;
}
buffer_string_set_length(b, i);
if (opts->backend == BACKEND_PROXY && !is_nph) {
/* invalid response Status-Line from HTTP proxy */
con->http_status = 502; /* Bad Gateway */
con->mode = DIRECT;
return HANDLER_FINISHED;
}
if (0 != http_response_process_headers(srv, con, opts, b)) {
return HANDLER_ERROR;
}
con->file_started = 1;
if (opts->authorizer
&& (con->http_status == 0 || con->http_status == 200)) {
return HANDLER_GO_ON;
}
if (con->mode == DIRECT) {
return HANDLER_FINISHED;
}
if (opts->local_redir && con->http_status >= 300 && con->http_status < 400){
/*(con->response.htags & HTTP_HEADER_LOCATION)*/
handler_t rc = http_response_process_local_redir(srv, con, blen);
if (con->mode == DIRECT) con->file_started = 0;
if (rc != HANDLER_GO_ON) return rc;
}
if (opts->xsendfile_allow) {
buffer *vb;
/* X-Sendfile2 is deprecated; historical for fastcgi */
if (opts->backend == BACKEND_FASTCGI
&& NULL != (vb = http_header_response_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("X-Sendfile2")))) {
http_response_xsendfile2(srv, con, vb, opts->xsendfile_docroot);
/* http_header_response_unset() shortcut for HTTP_HEADER_OTHER */
buffer_clear(vb); /*(do not send to client)*/
if (con->mode == DIRECT) con->file_started = 0;
return HANDLER_FINISHED;
} else if (NULL != (vb = http_header_response_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("X-Sendfile")))
|| (opts->backend == BACKEND_FASTCGI /* X-LIGHTTPD-send-file is deprecated; historical for fastcgi */
&& NULL != (vb = http_header_response_get(con, HTTP_HEADER_OTHER, CONST_STR_LEN("X-LIGHTTPD-send-file"))))) {
http_response_xsendfile(srv, con, vb, opts->xsendfile_docroot);
/* http_header_response_unset() shortcut for HTTP_HEADER_OTHER */
buffer_clear(vb); /*(do not send to client)*/
if (con->mode == DIRECT) con->file_started = 0;
return HANDLER_FINISHED;
}
}
if (blen > 0) {
if (0 != http_chunk_append_mem(srv, con, bstart, blen)) {
return HANDLER_ERROR;
}
}
/* (callback for response headers complete) */
return (opts->headers) ? opts->headers(srv, con, opts) : HANDLER_GO_ON;
}
handler_t http_response_read(server *srv, connection *con, http_response_opts *opts, buffer *b, fdnode *fdn) {
const int fd = fdn->fd;
while (1) {
ssize_t n;
size_t avail = buffer_string_space(b);
unsigned int toread = 0;
if (0 == fdevent_ioctl_fionread(fd, opts->fdfmt, (int *)&toread)) {
if (avail < toread) {
size_t blen = buffer_string_length(b);
if (toread + blen < 4096)
toread = 4095 - blen;
else if (toread > MAX_READ_LIMIT)
toread = MAX_READ_LIMIT;
}
else if (0 == toread) {
#if 0
return (fdevent_fdnode_interest(fdn) & FDEVENT_IN)
? HANDLER_FINISHED /* read finished */
: HANDLER_GO_ON; /* optimistic read; data not ready */
#else
if (!(fdevent_fdnode_interest(fdn) & FDEVENT_IN)) {
if (!(con->conf.stream_response_body
& FDEVENT_STREAM_RESPONSE_POLLRDHUP))
return HANDLER_GO_ON;/*optimistic read; data not ready*/
}
if (0 == avail) /* let read() below indicate if EOF or EAGAIN */
toread = 1024;
#endif
}
}
else if (avail < 1024) {
toread = 4095 - avail;
}
if (con->conf.stream_response_body & FDEVENT_STREAM_RESPONSE_BUFMIN) {
off_t cqlen = chunkqueue_length(con->write_queue);
if (cqlen + (off_t)toread > 65536 - 4096) {
if (!con->is_writable) {
/*(defer removal of FDEVENT_IN interest since
* connection_state_machine() might be able to send data
* immediately, unless !con->is_writable, where
* connection_state_machine() might not loop back to call
* mod_proxy_handle_subrequest())*/
fdevent_fdnode_event_clr(srv->ev, fdn, FDEVENT_IN);
}
if (cqlen >= 65536-1) return HANDLER_GO_ON;
toread = 65536 - 1 - (unsigned int)cqlen;
/* Note: heuristic is fuzzy in that it limits how much to read
* from backend based on how much is pending to write to client.
* Modules where data from backend is framed (e.g. FastCGI) may
* want to limit how much is buffered from backend while waiting
* for a complete data frame or data packet from backend. */
}
}
if (avail < toread) {
/*(add avail+toread to reduce allocations when ioctl EOPNOTSUPP)*/
avail = avail ? avail - 1 + toread : toread;
buffer_string_prepare_append(b, avail);
}
n = read(fd, b->ptr+buffer_string_length(b), avail);
if (n < 0) {
switch (errno) {
case EAGAIN:
#ifdef EWOULDBLOCK
#if EWOULDBLOCK != EAGAIN
case EWOULDBLOCK:
#endif
#endif
case EINTR:
return HANDLER_GO_ON;
default:
log_error_write(srv, __FILE__, __LINE__, "ssdd",
"read():", strerror(errno), con->fd, fd);
return HANDLER_ERROR;
}
}
buffer_commit(b, (size_t)n);
if (NULL != opts->parse) {
handler_t rc = opts->parse(srv, con, opts, b, (size_t)n);
if (rc != HANDLER_GO_ON) return rc;
} else if (0 == n) {
/* note: no further data is sent to backend after read EOF on socket
* (not checking for half-closed TCP socket)
* (backend should read all data desired prior to closing socket,
* though might send app-level close data frame, if applicable) */
return HANDLER_FINISHED; /* read finished */
} else if (0 == con->file_started) {
/* split header from body */
handler_t rc = http_response_parse_headers(srv, con, opts, b);
if (rc != HANDLER_GO_ON) return rc;
/* accumulate response in b until headers completed (or error) */
if (con->file_started) buffer_clear(b);
} else {
if (0 != http_chunk_append_buffer(srv, con, b)) {
/* error writing to tempfile;
* truncate response or send 500 if nothing sent yet */
return HANDLER_ERROR;
}
buffer_clear(b);
}
if ((con->conf.stream_response_body & FDEVENT_STREAM_RESPONSE_BUFMIN)
&& chunkqueue_length(con->write_queue) > 65536 - 4096) {
if (!con->is_writable) {
/*(defer removal of FDEVENT_IN interest since
* connection_state_machine() might be able to send
* data immediately, unless !con->is_writable, where
* connection_state_machine() might not loop back to
* call the subrequest handler)*/
fdevent_fdnode_event_clr(srv->ev, fdn, FDEVENT_IN);
}
break;
}
if ((size_t)n < avail)
break; /* emptied kernel read buffer or partial read */
}
return HANDLER_GO_ON;
}
int http_cgi_headers (server *srv, connection *con, http_cgi_opts *opts, http_cgi_header_append_cb cb, void *vdata) {
/* CGI-SPEC 6.1.2, FastCGI spec 6.3 and SCGI spec */
int rc = 0;
server_socket *srv_sock = con->srv_socket;
const char *s;
size_t n;
char buf[LI_ITOSTRING_LENGTH];
sock_addr *addr;
sock_addr addrbuf;
char b2[INET6_ADDRSTRLEN + 1];
/* (CONTENT_LENGTH must be first for SCGI) */
if (!opts->authorizer) {
li_itostrn(buf, sizeof(buf), con->request.content_length);
rc |= cb(vdata, CONST_STR_LEN("CONTENT_LENGTH"), buf, strlen(buf));
}
if (!buffer_string_is_empty(con->uri.query)) {
rc |= cb(vdata, CONST_STR_LEN("QUERY_STRING"),
CONST_BUF_LEN(con->uri.query));
} else {
rc |= cb(vdata, CONST_STR_LEN("QUERY_STRING"),
CONST_STR_LEN(""));
}
if (!buffer_string_is_empty(opts->strip_request_uri)) {
/**
* /app1/index/list
*
* stripping /app1 or /app1/ should lead to
*
* /index/list
*
*/
size_t len = buffer_string_length(opts->strip_request_uri);
if ('/' == opts->strip_request_uri->ptr[len-1]) {
--len;
}
if (buffer_string_length(con->request.orig_uri) >= len
&& 0 == memcmp(con->request.orig_uri->ptr,
opts->strip_request_uri->ptr, len)
&& con->request.orig_uri->ptr[len] == '/') {
rc |= cb(vdata, CONST_STR_LEN("REQUEST_URI"),
con->request.orig_uri->ptr+len,
buffer_string_length(con->request.orig_uri) - len);
} else {
rc |= cb(vdata, CONST_STR_LEN("REQUEST_URI"),
CONST_BUF_LEN(con->request.orig_uri));
}
} else {
rc |= cb(vdata, CONST_STR_LEN("REQUEST_URI"),
CONST_BUF_LEN(con->request.orig_uri));
}
if (!buffer_is_equal(con->request.uri, con->request.orig_uri)) {
rc |= cb(vdata, CONST_STR_LEN("REDIRECT_URI"),
CONST_BUF_LEN(con->request.uri));
}
/* set REDIRECT_STATUS for php compiled with --force-redirect
* (if REDIRECT_STATUS has not already been set by error handler) */
if (0 == con->error_handler_saved_status) {
rc |= cb(vdata, CONST_STR_LEN("REDIRECT_STATUS"),
CONST_STR_LEN("200"));
}
/*
* SCRIPT_NAME, PATH_INFO and PATH_TRANSLATED according to
* http://cgi-spec.golux.com/draft-coar-cgi-v11-03-clean.html
* (6.1.14, 6.1.6, 6.1.7)
*/
if (!opts->authorizer) {
rc |= cb(vdata, CONST_STR_LEN("SCRIPT_NAME"),
CONST_BUF_LEN(con->uri.path));
if (!buffer_string_is_empty(con->request.pathinfo)) {
rc |= cb(vdata, CONST_STR_LEN("PATH_INFO"),
CONST_BUF_LEN(con->request.pathinfo));
/* PATH_TRANSLATED is only defined if PATH_INFO is set */
if (!buffer_string_is_empty(opts->docroot)) {
buffer_copy_buffer(srv->tmp_buf, opts->docroot);
} else {
buffer_copy_buffer(srv->tmp_buf, con->physical.basedir);
}
buffer_append_string_buffer(srv->tmp_buf, con->request.pathinfo);
rc |= cb(vdata, CONST_STR_LEN("PATH_TRANSLATED"),
CONST_BUF_LEN(srv->tmp_buf));
}
}
/*
* SCRIPT_FILENAME and DOCUMENT_ROOT for php
* The PHP manual http://www.php.net/manual/en/reserved.variables.php
* treatment of PATH_TRANSLATED is different from the one of CGI specs.
* (see php.ini cgi.fix_pathinfo = 1 config parameter)
*/
if (!buffer_string_is_empty(opts->docroot)) {
/* alternate docroot, e.g. for remote FastCGI or SCGI server */
buffer_copy_buffer(srv->tmp_buf, opts->docroot);
buffer_append_string_buffer(srv->tmp_buf, con->uri.path);
rc |= cb(vdata, CONST_STR_LEN("SCRIPT_FILENAME"),
CONST_BUF_LEN(srv->tmp_buf));
rc |= cb(vdata, CONST_STR_LEN("DOCUMENT_ROOT"),
CONST_BUF_LEN(opts->docroot));
} else {
if (opts->break_scriptfilename_for_php) {
/* php.ini config cgi.fix_pathinfo = 1 need a broken SCRIPT_FILENAME
* to find out what PATH_INFO is itself
*
* see src/sapi/cgi_main.c, init_request_info()
*/
buffer_copy_buffer(srv->tmp_buf, con->physical.path);
buffer_append_string_buffer(srv->tmp_buf, con->request.pathinfo);
rc |= cb(vdata, CONST_STR_LEN("SCRIPT_FILENAME"),
CONST_BUF_LEN(srv->tmp_buf));
} else {
rc |= cb(vdata, CONST_STR_LEN("SCRIPT_FILENAME"),
CONST_BUF_LEN(con->physical.path));
}
rc |= cb(vdata, CONST_STR_LEN("DOCUMENT_ROOT"),
CONST_BUF_LEN(con->physical.basedir));
}
s = get_http_method_name(con->request.http_method);
force_assert(s);
rc |= cb(vdata, CONST_STR_LEN("REQUEST_METHOD"), s, strlen(s));
s = get_http_version_name(con->request.http_version);
force_assert(s);
rc |= cb(vdata, CONST_STR_LEN("SERVER_PROTOCOL"), s, strlen(s));
rc |= cb(vdata, CONST_STR_LEN("SERVER_SOFTWARE"),
CONST_BUF_LEN(con->conf.server_tag));
rc |= cb(vdata, CONST_STR_LEN("GATEWAY_INTERFACE"),
CONST_STR_LEN("CGI/1.1"));
rc |= cb(vdata, CONST_STR_LEN("REQUEST_SCHEME"),
CONST_BUF_LEN(con->uri.scheme));
if (buffer_is_equal_string(con->uri.scheme, CONST_STR_LEN("https"))) {
rc |= cb(vdata, CONST_STR_LEN("HTTPS"), CONST_STR_LEN("on"));
}
addr = &srv_sock->addr;
li_utostrn(buf, sizeof(buf), sock_addr_get_port(addr));
rc |= cb(vdata, CONST_STR_LEN("SERVER_PORT"), buf, strlen(buf));
switch (addr->plain.sa_family) {
case AF_INET:
case AF_INET6:
if (sock_addr_is_addr_wildcard(addr)) {
socklen_t addrlen = sizeof(addrbuf);
if (0 == getsockname(con->fd,(struct sockaddr *)&addrbuf,&addrlen)){
addr = &addrbuf;
} else {
s = "";
break;
}
}
s = sock_addr_inet_ntop(addr, b2, sizeof(b2)-1);
if (NULL == s) s = "";
break;
default:
s = "";
break;
}
force_assert(s);
rc |= cb(vdata, CONST_STR_LEN("SERVER_ADDR"), s, strlen(s));
if (!buffer_string_is_empty(con->server_name)) {
size_t len = buffer_string_length(con->server_name);
if (con->server_name->ptr[0] == '[') {
const char *colon = strstr(con->server_name->ptr, "]:");
if (colon) len = (colon + 1) - con->server_name->ptr;
} else {
const char *colon = strchr(con->server_name->ptr, ':');
if (colon) len = colon - con->server_name->ptr;
}
rc |= cb(vdata, CONST_STR_LEN("SERVER_NAME"),
con->server_name->ptr, len);
} else {
/* set to be same as SERVER_ADDR (above) */
rc |= cb(vdata, CONST_STR_LEN("SERVER_NAME"), s, strlen(s));
}
rc |= cb(vdata, CONST_STR_LEN("REMOTE_ADDR"),
CONST_BUF_LEN(con->dst_addr_buf));
li_utostrn(buf, sizeof(buf), sock_addr_get_port(&con->dst_addr));
rc |= cb(vdata, CONST_STR_LEN("REMOTE_PORT"), buf, strlen(buf));
for (n = 0; n < con->request.headers->used; n++) {
data_string *ds = (data_string *)con->request.headers->data[n];
if (!buffer_string_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
/* Security: Do not emit HTTP_PROXY in environment.
* Some executables use HTTP_PROXY to configure
* outgoing proxy. See also https://httpoxy.org/ */
if (buffer_is_equal_caseless_string(ds->key,
CONST_STR_LEN("Proxy"))) {
continue;
}
buffer_copy_string_encoded_cgi_varnames(srv->tmp_buf,
CONST_BUF_LEN(ds->key), 1);
rc |= cb(vdata, CONST_BUF_LEN(srv->tmp_buf),
CONST_BUF_LEN(ds->value));
}
}
srv->request_env(srv, con);
for (n = 0; n < con->environment->used; n++) {
data_string *ds = (data_string *)con->environment->data[n];
if (!buffer_is_empty(ds->value) && !buffer_is_empty(ds->key)) {
buffer_copy_string_encoded_cgi_varnames(srv->tmp_buf,
CONST_BUF_LEN(ds->key), 0);
rc |= cb(vdata, CONST_BUF_LEN(srv->tmp_buf),
CONST_BUF_LEN(ds->value));
}
}
return rc;
}