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| version 1.1.1.1, 2013/10/14 10:32:48 | version 1.1.1.2, 2016/11/02 10:35:00 |
|---|---|
| Line 1 | Line 1 |
| #include "first.h" | |
| #include "base.h" | #include "base.h" |
| #include "array.h" | #include "array.h" |
| #include "buffer.h" | #include "buffer.h" |
| #include "log.h" | #include "log.h" |
| #include "etag.h" | #include "etag.h" |
| #include "http_chunk.h" | |
| #include "response.h" | #include "response.h" |
| #include "stat_cache.h" | |
| #include <string.h> | #include <string.h> |
| #include <errno.h> | #include <errno.h> |
| Line 123 int http_response_redirect_to_directory(server *srv, c | Line 127 int http_response_redirect_to_directory(server *srv, c |
| o = buffer_init(); | o = buffer_init(); |
| buffer_copy_string_buffer(o, con->uri.scheme); | buffer_copy_buffer(o, con->uri.scheme); |
| buffer_append_string_len(o, CONST_STR_LEN("://")); | buffer_append_string_len(o, CONST_STR_LEN("://")); |
| if (con->uri.authority->used) { | if (!buffer_is_empty(con->uri.authority)) { |
| buffer_append_string_buffer(o, con->uri.authority); | buffer_append_string_buffer(o, con->uri.authority); |
| } else { | } else { |
| /* get the name of the currently connected socket */ | /* get the name of the currently connected socket */ |
| Line 138 int http_response_redirect_to_directory(server *srv, c | Line 142 int http_response_redirect_to_directory(server *srv, c |
| our_addr_len = sizeof(our_addr); | our_addr_len = sizeof(our_addr); |
| if (-1 == getsockname(con->fd, &(our_addr.plain), &our_addr_len)) { | if (-1 == getsockname(con->fd, (struct sockaddr *)&our_addr, &our_addr_len) |
| || our_addr_len > (socklen_t)sizeof(our_addr)) { | |
| con->http_status = 500; | con->http_status = 500; |
| log_error_write(srv, __FILE__, __LINE__, "ss", | log_error_write(srv, __FILE__, __LINE__, "ss", |
| Line 163 int http_response_redirect_to_directory(server *srv, c | Line 168 int http_response_redirect_to_directory(server *srv, c |
| "SSS", "NOTICE: getnameinfo failed: ", | "SSS", "NOTICE: getnameinfo failed: ", |
| strerror(errno), ", using ip-address instead"); | strerror(errno), ", using ip-address instead"); |
| buffer_append_string_len(o, CONST_STR_LEN("[")); | |
| buffer_append_string(o, | buffer_append_string(o, |
| inet_ntop(AF_INET6, (char *)&our_addr.ipv6.sin6_addr, | inet_ntop(AF_INET6, (char *)&our_addr.ipv6.sin6_addr, |
| dst, sizeof(dst))); | dst, sizeof(dst))); |
| buffer_append_string_len(o, CONST_STR_LEN("]")); | |
| } else { | } else { |
| buffer_append_string(o, hbuf); | buffer_append_string(o, hbuf); |
| } | } |
| Line 197 int http_response_redirect_to_directory(server *srv, c | Line 204 int http_response_redirect_to_directory(server *srv, c |
| } | } |
| if (default_port != srv->srvconf.port) { | if (default_port != srv->srvconf.port) { |
| buffer_append_string_len(o, CONST_STR_LEN(":")); | buffer_append_string_len(o, CONST_STR_LEN(":")); |
| buffer_append_long(o, srv->srvconf.port); | buffer_append_int(o, srv->srvconf.port); |
| } | } |
| } | } |
| } | } |
| buffer_append_string_buffer(o, con->uri.path); | buffer_append_string_encoded(o, CONST_BUF_LEN(con->uri.path), ENCODING_REL_URI); |
| buffer_append_string_len(o, CONST_STR_LEN("/")); | buffer_append_string_len(o, CONST_STR_LEN("/")); |
| if (!buffer_is_empty(con->uri.query)) { | if (!buffer_string_is_empty(con->uri.query)) { |
| buffer_append_string_len(o, CONST_STR_LEN("?")); | buffer_append_string_len(o, CONST_STR_LEN("?")); |
| buffer_append_string_buffer(o, con->uri.query); | buffer_append_string_buffer(o, con->uri.query); |
| } | } |
| Line 235 buffer * strftime_cache_get(server *srv, time_t last_m | Line 242 buffer * strftime_cache_get(server *srv, time_t last_m |
| } | } |
| srv->mtime_cache[i].mtime = last_mod; | srv->mtime_cache[i].mtime = last_mod; |
| buffer_prepare_copy(srv->mtime_cache[i].str, 1024); | buffer_string_prepare_copy(srv->mtime_cache[i].str, 1023); |
| tm = gmtime(&(srv->mtime_cache[i].mtime)); | tm = gmtime(&(srv->mtime_cache[i].mtime)); |
| srv->mtime_cache[i].str->used = strftime(srv->mtime_cache[i].str->ptr, | buffer_append_strftime(srv->mtime_cache[i].str, "%a, %d %b %Y %H:%M:%S GMT", tm); |
| srv->mtime_cache[i].str->size - 1, | |
| "%a, %d %b %Y %H:%M:%S GMT", tm); | |
| srv->mtime_cache[i].str->used++; | |
| return srv->mtime_cache[i].str; | return srv->mtime_cache[i].str; |
| } | } |
| int http_response_handle_cachable(server *srv, connection *con, buffer *mtime) { | int http_response_handle_cachable(server *srv, connection *con, buffer *mtime) { |
| int head_or_get = | |
| ( HTTP_METHOD_GET == con->request.http_method | |
| || HTTP_METHOD_HEAD == con->request.http_method); | |
| UNUSED(srv); | UNUSED(srv); |
| /* | /* |
| * 14.26 If-None-Match | * 14.26 If-None-Match |
| * [...] | * [...] |
| Line 258 int http_response_handle_cachable(server *srv, connect | Line 266 int http_response_handle_cachable(server *srv, connect |
| * return a 304 (Not Modified) response. | * return a 304 (Not Modified) response. |
| */ | */ |
| /* last-modified handling */ | |
| if (con->request.http_if_none_match) { | if (con->request.http_if_none_match) { |
| if (etag_is_equal(con->physical.etag, con->request.http_if_none_match)) { | /* use strong etag checking for now: weak comparison must not be used |
| if (con->request.http_method == HTTP_METHOD_GET || | * for ranged requests |
| con->request.http_method == HTTP_METHOD_HEAD) { | */ |
| if (etag_is_equal(con->physical.etag, con->request.http_if_none_match, 0)) { | |
| if (head_or_get) { | |
| con->http_status = 304; | con->http_status = 304; |
| return HANDLER_FINISHED; | return HANDLER_FINISHED; |
| } else { | } else { |
| Line 272 int http_response_handle_cachable(server *srv, connect | Line 280 int http_response_handle_cachable(server *srv, connect |
| return HANDLER_FINISHED; | return HANDLER_FINISHED; |
| } | } |
| } | } |
| } else if (con->request.http_if_modified_since && | } else if (con->request.http_if_modified_since && head_or_get) { |
| (con->request.http_method == HTTP_METHOD_GET || | /* last-modified handling */ |
| con->request.http_method == HTTP_METHOD_HEAD)) { | |
| size_t used_len; | size_t used_len; |
| char *semicolon; | char *semicolon; |
| Line 319 int http_response_handle_cachable(server *srv, connect | Line 326 int http_response_handle_cachable(server *srv, connect |
| } | } |
| return HANDLER_GO_ON; | return HANDLER_GO_ON; |
| } | |
| static int http_response_parse_range(server *srv, connection *con, buffer *path, stat_cache_entry *sce) { | |
| int multipart = 0; | |
| int error; | |
| off_t start, end; | |
| const char *s, *minus; | |
| char *boundary = "fkj49sn38dcn3"; | |
| data_string *ds; | |
| buffer *content_type = NULL; | |
| start = 0; | |
| end = sce->st.st_size - 1; | |
| con->response.content_length = 0; | |
| if (NULL != (ds = (data_string *)array_get_element(con->response.headers, "Content-Type"))) { | |
| content_type = ds->value; | |
| } | |
| for (s = con->request.http_range, error = 0; | |
| !error && *s && NULL != (minus = strchr(s, '-')); ) { | |
| char *err; | |
| off_t la, le; | |
| 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>- */ | |
| la = strtoll(s, &err, 10); | |
| if (err == minus) { | |
| /* 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 { | |
| /* error */ | |
| error = 1; | |
| } | |
| } else { | |
| /* <start>-<stop> */ | |
| la = strtoll(s, &err, 10); | |
| if (err == minus) { | |
| 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; | |
| } | |
| } 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 = buffer_init(); | |
| buffer_copy_string_len(b, CONST_STR_LEN("\r\n--")); | |
| buffer_append_string(b, boundary); | |
| /* 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); | |
| 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_buffer(con->write_queue, b); | |
| buffer_free(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 = buffer_init(); | |
| buffer_copy_string_len(b, "\r\n--", 4); | |
| buffer_append_string(b, boundary); | |
| buffer_append_string_len(b, "--\r\n", 4); | |
| con->response.content_length += buffer_string_length(b); | |
| chunkqueue_append_buffer(con->write_queue, b); | |
| buffer_free(b); | |
| /* set header-fields */ | |
| buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("multipart/byteranges; boundary=")); | |
| buffer_append_string(srv->tmp_buf, boundary); | |
| /* overwrite content-type */ | |
| response_header_overwrite(srv, con, 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); | |
| response_header_insert(srv, con, 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; | |
| data_string *ds; | |
| 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 == array_get_element(con->response.headers, "Content-Type")) { | |
| 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 | |
| */ | |
| response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("application/octet-stream")); | |
| allow_caching = 0; | |
| } else { | |
| response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type)); | |
| } | |
| } | |
| if (con->conf.range_requests) { | |
| response_header_overwrite(srv, con, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes")); | |
| } | |
| if (allow_caching) { | |
| if (con->etag_flags != 0 && !buffer_string_is_empty(sce->etag)) { | |
| if (NULL == array_get_element(con->response.headers, "ETag")) { | |
| /* generate e-tag */ | |
| etag_mutate(con->physical.etag, sce->etag); | |
| response_header_overwrite(srv, con, CONST_STR_LEN("ETag"), CONST_BUF_LEN(con->physical.etag)); | |
| } | |
| } | |
| /* prepare header */ | |
| if (NULL == (ds = (data_string *)array_get_element(con->response.headers, "Last-Modified"))) { | |
| mtime = strftime_cache_get(srv, sce->st.st_mtime); | |
| response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime)); | |
| } else { | |
| mtime = ds->value; | |
| } | |
| if (HANDLER_FINISHED == http_response_handle_cachable(srv, con, mtime)) { | |
| return; | |
| } | |
| } | |
| if (con->request.http_range && con->conf.range_requests | |
| && (200 == con->http_status || 0 == con->http_status) | |
| && NULL == array_get_element(con->response.headers, "Content-Encoding")) { | |
| int do_range_request = 1; | |
| /* check if we have a conditional GET */ | |
| if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "If-Range"))) { | |
| /* if the value is the same as our ETag, we do a Range-request, | |
| * otherwise a full 200 */ | |
| if (ds->value->ptr[0] == '"') { | |
| /** | |
| * client wants a ETag | |
| */ | |
| if (!con->physical.etag) { | |
| do_range_request = 0; | |
| } else if (!buffer_is_equal(ds->value, 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(ds->value, mtime)) { | |
| do_range_request = 0; | |
| } | |
| } | |
| if (do_range_request) { | |
| /* content prepared, I'm done */ | |
| con->file_finished = 1; | |
| if (0 == http_response_parse_range(srv, con, path, sce)) { | |
| 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; | |
| } | |
| } | |
| void http_response_xsendfile (server *srv, connection *con, buffer *path, const array *xdocroot) { | |
| const int status = con->http_status; | |
| int valid = 1; | |
| con->file_started = 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->parsed_response & HTTP_CONTENT_LENGTH) { | |
| data_string *ds = (data_string *) array_get_element(con->response.headers, "Content-Length"); | |
| if (ds) buffer_reset(ds->value); | |
| con->parsed_response &= ~HTTP_CONTENT_LENGTH; | |
| con->response.content_length = -1; | |
| } | |
| buffer_urldecode_path(path); | |
| 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; | |
| } | |
| } | |
| 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; | |
| } | |
| } | } |