[core] http_response_send_file() shared code (#2017)
move code from mod_staticfile.c to http-header-glue.c to allow reuse (includes ETag, Last-Modified headers, Range requests for static files) operate on path arg instead of con->physical.path skip Range requests if con->http_status already set >= 300 remove redundant calls to stat_cache_get_entry() handling Range requests x-ref: "X-Sendfile handoff to mod-static-file in 1.4.x" https://redmine.lighttpd.net/issues/2017
This commit is contained in:
parent
8f255d35df
commit
4a51d2ab8c
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@ -5,7 +5,9 @@
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#include "buffer.h"
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#include "log.h"
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#include "etag.h"
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#include "http_chunk.h"
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#include "response.h"
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#include "stat_cache.h"
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#include <string.h>
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#include <errno.h>
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@ -323,3 +325,343 @@ int http_response_handle_cachable(server *srv, connection *con, buffer *mtime) {
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return HANDLER_GO_ON;
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}
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static int http_response_parse_range(server *srv, connection *con, buffer *path, stat_cache_entry *sce) {
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int multipart = 0;
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int error;
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off_t start, end;
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const char *s, *minus;
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char *boundary = "fkj49sn38dcn3";
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data_string *ds;
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buffer *content_type = NULL;
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start = 0;
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end = sce->st.st_size - 1;
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con->response.content_length = 0;
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if (NULL != (ds = (data_string *)array_get_element(con->response.headers, "Content-Type"))) {
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content_type = ds->value;
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}
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for (s = con->request.http_range, error = 0;
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!error && *s && NULL != (minus = strchr(s, '-')); ) {
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char *err;
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off_t la, le;
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if (s == minus) {
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/* -<stop> */
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le = strtoll(s, &err, 10);
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if (le == 0) {
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/* RFC 2616 - 14.35.1 */
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con->http_status = 416;
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error = 1;
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} else if (*err == '\0') {
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/* end */
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s = err;
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end = sce->st.st_size - 1;
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start = sce->st.st_size + le;
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} else if (*err == ',') {
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multipart = 1;
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s = err + 1;
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end = sce->st.st_size - 1;
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start = sce->st.st_size + le;
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} else {
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error = 1;
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}
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} else if (*(minus+1) == '\0' || *(minus+1) == ',') {
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/* <start>- */
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la = strtoll(s, &err, 10);
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if (err == minus) {
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/* ok */
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if (*(err + 1) == '\0') {
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s = err + 1;
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end = sce->st.st_size - 1;
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start = la;
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} else if (*(err + 1) == ',') {
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multipart = 1;
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s = err + 2;
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end = sce->st.st_size - 1;
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start = la;
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} else {
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error = 1;
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}
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} else {
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/* error */
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error = 1;
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}
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} else {
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/* <start>-<stop> */
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la = strtoll(s, &err, 10);
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if (err == minus) {
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le = strtoll(minus+1, &err, 10);
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/* RFC 2616 - 14.35.1 */
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if (la > le) {
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error = 1;
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}
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if (*err == '\0') {
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/* ok, end*/
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s = err;
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end = le;
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start = la;
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} else if (*err == ',') {
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multipart = 1;
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s = err + 1;
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end = le;
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start = la;
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} else {
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/* error */
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error = 1;
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}
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} else {
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/* error */
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error = 1;
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}
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}
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if (!error) {
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if (start < 0) start = 0;
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/* RFC 2616 - 14.35.1 */
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if (end > sce->st.st_size - 1) end = sce->st.st_size - 1;
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if (start > sce->st.st_size - 1) {
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error = 1;
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con->http_status = 416;
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}
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}
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if (!error) {
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if (multipart) {
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/* write boundary-header */
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buffer *b = buffer_init();
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buffer_copy_string_len(b, CONST_STR_LEN("\r\n--"));
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buffer_append_string(b, boundary);
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/* write Content-Range */
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buffer_append_string_len(b, CONST_STR_LEN("\r\nContent-Range: bytes "));
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buffer_append_int(b, start);
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buffer_append_string_len(b, CONST_STR_LEN("-"));
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buffer_append_int(b, end);
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buffer_append_string_len(b, CONST_STR_LEN("/"));
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buffer_append_int(b, sce->st.st_size);
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buffer_append_string_len(b, CONST_STR_LEN("\r\nContent-Type: "));
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buffer_append_string_buffer(b, content_type);
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/* write END-OF-HEADER */
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buffer_append_string_len(b, CONST_STR_LEN("\r\n\r\n"));
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con->response.content_length += buffer_string_length(b);
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chunkqueue_append_buffer(con->write_queue, b);
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buffer_free(b);
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}
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chunkqueue_append_file(con->write_queue, path, start, end - start + 1);
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con->response.content_length += end - start + 1;
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}
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}
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/* something went wrong */
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if (error) return -1;
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if (multipart) {
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/* add boundary end */
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buffer *b = buffer_init();
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buffer_copy_string_len(b, "\r\n--", 4);
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buffer_append_string(b, boundary);
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buffer_append_string_len(b, "--\r\n", 4);
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con->response.content_length += buffer_string_length(b);
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chunkqueue_append_buffer(con->write_queue, b);
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buffer_free(b);
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/* set header-fields */
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buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("multipart/byteranges; boundary="));
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buffer_append_string(srv->tmp_buf, boundary);
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/* overwrite content-type */
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response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(srv->tmp_buf));
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} else {
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/* add Content-Range-header */
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buffer_copy_string_len(srv->tmp_buf, CONST_STR_LEN("bytes "));
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buffer_append_int(srv->tmp_buf, start);
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buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("-"));
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buffer_append_int(srv->tmp_buf, end);
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buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("/"));
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buffer_append_int(srv->tmp_buf, sce->st.st_size);
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response_header_insert(srv, con, CONST_STR_LEN("Content-Range"), CONST_BUF_LEN(srv->tmp_buf));
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}
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/* ok, the file is set-up */
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return 0;
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}
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void http_response_send_file (server *srv, connection *con, buffer *path) {
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stat_cache_entry *sce = NULL;
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buffer *mtime = NULL;
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data_string *ds;
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int allow_caching = 1;
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if (HANDLER_ERROR == stat_cache_get_entry(srv, con, path, &sce)) {
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con->http_status = (errno == ENOENT) ? 404 : 403;
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log_error_write(srv, __FILE__, __LINE__, "sbsb",
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"not a regular file:", con->uri.path,
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"->", path);
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return;
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}
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/* we only handline regular files */
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#ifdef HAVE_LSTAT
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if ((sce->is_symlink == 1) && !con->conf.follow_symlink) {
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con->http_status = 403;
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if (con->conf.log_request_handling) {
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log_error_write(srv, __FILE__, __LINE__, "s", "-- access denied due symlink restriction");
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log_error_write(srv, __FILE__, __LINE__, "sb", "Path :", path);
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}
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return;
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}
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#endif
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if (!S_ISREG(sce->st.st_mode)) {
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con->http_status = 403;
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if (con->conf.log_file_not_found) {
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log_error_write(srv, __FILE__, __LINE__, "sbsb",
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"not a regular file:", con->uri.path,
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"->", sce->name);
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}
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return;
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}
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/* mod_compress might set several data directly, don't overwrite them */
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/* set response content-type, if not set already */
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if (NULL == array_get_element(con->response.headers, "Content-Type")) {
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if (buffer_string_is_empty(sce->content_type)) {
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/* we are setting application/octet-stream, but also announce that
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* this header field might change in the seconds few requests
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*
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* This should fix the aggressive caching of FF and the script download
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* seen by the first installations
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*/
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response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("application/octet-stream"));
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allow_caching = 0;
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} else {
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response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(sce->content_type));
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}
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}
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if (con->conf.range_requests) {
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response_header_overwrite(srv, con, CONST_STR_LEN("Accept-Ranges"), CONST_STR_LEN("bytes"));
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}
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if (allow_caching) {
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if (con->etag_flags != 0 && !buffer_string_is_empty(sce->etag)) {
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if (NULL == array_get_element(con->response.headers, "ETag")) {
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/* generate e-tag */
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etag_mutate(con->physical.etag, sce->etag);
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response_header_overwrite(srv, con, CONST_STR_LEN("ETag"), CONST_BUF_LEN(con->physical.etag));
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}
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}
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/* prepare header */
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if (NULL == (ds = (data_string *)array_get_element(con->response.headers, "Last-Modified"))) {
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mtime = strftime_cache_get(srv, sce->st.st_mtime);
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response_header_overwrite(srv, con, CONST_STR_LEN("Last-Modified"), CONST_BUF_LEN(mtime));
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} else {
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mtime = ds->value;
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}
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if (HANDLER_FINISHED == http_response_handle_cachable(srv, con, mtime)) {
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return;
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}
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}
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if (con->request.http_range && con->conf.range_requests && con->http_status < 300) {
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int do_range_request = 1;
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/* check if we have a conditional GET */
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if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "If-Range"))) {
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/* if the value is the same as our ETag, we do a Range-request,
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* otherwise a full 200 */
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if (ds->value->ptr[0] == '"') {
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/**
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* client wants a ETag
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*/
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if (!con->physical.etag) {
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do_range_request = 0;
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} else if (!buffer_is_equal(ds->value, con->physical.etag)) {
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do_range_request = 0;
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}
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} else if (!mtime) {
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/**
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* we don't have a Last-Modified and can match the If-Range:
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*
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* sending all
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*/
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do_range_request = 0;
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} else if (!buffer_is_equal(ds->value, mtime)) {
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do_range_request = 0;
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}
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}
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if (do_range_request) {
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/* content prepared, I'm done */
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con->file_finished = 1;
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if (0 == http_response_parse_range(srv, con, path, sce)) {
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con->http_status = 206;
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}
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return;
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}
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}
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/* if we are still here, prepare body */
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/* we add it here for all requests
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* the HEAD request will drop it afterwards again
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*/
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if (0 == sce->st.st_size || 0 == http_chunk_append_file(srv, con, path)) {
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con->http_status = 200;
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con->file_finished = 1;
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} else {
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con->http_status = 403;
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}
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}
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@ -34,8 +34,6 @@ typedef struct {
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typedef struct {
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PLUGIN_DATA;
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buffer *range_buf;
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plugin_config **config_storage;
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plugin_config conf;
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@ -47,8 +45,6 @@ INIT_FUNC(mod_staticfile_init) {
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p = calloc(1, sizeof(*p));
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p->range_buf = buffer_init();
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return p;
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}
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@ -73,7 +69,6 @@ FREE_FUNC(mod_staticfile_free) {
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}
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free(p->config_storage);
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}
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buffer_free(p->range_buf);
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free(p);
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@ -156,215 +151,10 @@ static int mod_staticfile_patch_connection(server *srv, connection *con, plugin_
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}
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#undef PATCH
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static int http_response_parse_range(server *srv, connection *con, plugin_data *p) {
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int multipart = 0;
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int error;
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off_t start, end;
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const char *s, *minus;
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char *boundary = "fkj49sn38dcn3";
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data_string *ds;
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stat_cache_entry *sce = NULL;
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buffer *content_type = NULL;
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if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
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SEGFAULT();
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}
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start = 0;
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end = sce->st.st_size - 1;
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con->response.content_length = 0;
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if (NULL != (ds = (data_string *)array_get_element(con->response.headers, "Content-Type"))) {
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content_type = ds->value;
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}
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for (s = con->request.http_range, error = 0;
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!error && *s && NULL != (minus = strchr(s, '-')); ) {
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char *err;
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off_t la, le;
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if (s == minus) {
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/* -<stop> */
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le = strtoll(s, &err, 10);
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if (le == 0) {
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/* RFC 2616 - 14.35.1 */
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con->http_status = 416;
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error = 1;
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} else if (*err == '\0') {
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/* end */
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s = err;
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end = sce->st.st_size - 1;
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start = sce->st.st_size + le;
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} else if (*err == ',') {
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multipart = 1;
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s = err + 1;
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end = sce->st.st_size - 1;
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start = sce->st.st_size + le;
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} else {
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error = 1;
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}
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} else if (*(minus+1) == '\0' || *(minus+1) == ',') {
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/* <start>- */
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la = strtoll(s, &err, 10);
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if (err == minus) {
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/* ok */
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if (*(err + 1) == '\0') {
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s = err + 1;
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end = sce->st.st_size - 1;
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start = la;
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} else if (*(err + 1) == ',') {
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multipart = 1;
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s = err + 2;
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end = sce->st.st_size - 1;
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start = la;
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} else {
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error = 1;
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}
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} else {
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/* error */
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error = 1;
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}
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} else {
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/* <start>-<stop> */
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la = strtoll(s, &err, 10);
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if (err == minus) {
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le = strtoll(minus+1, &err, 10);
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/* RFC 2616 - 14.35.1 */
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if (la > le) {
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error = 1;
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}
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if (*err == '\0') {
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/* ok, end*/
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s = err;
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end = le;
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start = la;
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} else if (*err == ',') {
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multipart = 1;
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s = err + 1;
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end = le;
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start = la;
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} else {
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/* error */
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error = 1;
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}
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} else {
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/* error */
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error = 1;
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}
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}
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if (!error) {
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if (start < 0) start = 0;
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|
||||
/* 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, con->physical.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(p->range_buf, CONST_STR_LEN("multipart/byteranges; boundary="));
|
||||
buffer_append_string(p->range_buf, boundary);
|
||||
|
||||
/* overwrite content-type */
|
||||
response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(p->range_buf));
|
||||
} else {
|
||||
/* add Content-Range-header */
|
||||
|
||||
buffer_copy_string_len(p->range_buf, CONST_STR_LEN("bytes "));
|
||||
buffer_append_int(p->range_buf, start);
|
||||
buffer_append_string_len(p->range_buf, CONST_STR_LEN("-"));
|
||||
buffer_append_int(p->range_buf, end);
|
||||
buffer_append_string_len(p->range_buf, CONST_STR_LEN("/"));
|
||||
buffer_append_int(p->range_buf, sce->st.st_size);
|
||||
|
||||
response_header_insert(srv, con, CONST_STR_LEN("Content-Range"), CONST_BUF_LEN(p->range_buf));
|
||||
}
|
||||
|
||||
/* ok, the file is set-up */
|
||||
return 0;
|
||||
}
|
||||
|
||||
URIHANDLER_FUNC(mod_staticfile_subrequest) {
|
||||
plugin_data *p = p_d;
|
||||
size_t k;
|
||||
stat_cache_entry *sce = NULL;
|
||||
buffer *mtime = NULL;
|
||||
data_string *ds;
|
||||
int allow_caching = 1;
|
||||
|
||||
/* someone else has done a decision for us */
|
||||
if (con->http_status != 0) return HANDLER_GO_ON;
|
||||
|
|
@ -412,140 +202,8 @@ URIHANDLER_FUNC(mod_staticfile_subrequest) {
|
|||
log_error_write(srv, __FILE__, __LINE__, "s", "-- handling file as static file");
|
||||
}
|
||||
|
||||
if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
|
||||
con->http_status = 403;
|
||||
|
||||
log_error_write(srv, __FILE__, __LINE__, "sbsb",
|
||||
"not a regular file:", con->uri.path,
|
||||
"->", con->physical.path);
|
||||
|
||||
return HANDLER_FINISHED;
|
||||
}
|
||||
|
||||
/* 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 :", con->physical.path);
|
||||
}
|
||||
|
||||
buffer_reset(con->physical.path);
|
||||
return HANDLER_FINISHED;
|
||||
}
|
||||
#endif
|
||||
if (!S_ISREG(sce->st.st_mode)) {
|
||||
con->http_status = 404;
|
||||
|
||||
if (con->conf.log_file_not_found) {
|
||||
log_error_write(srv, __FILE__, __LINE__, "sbsb",
|
||||
"not a regular file:", con->uri.path,
|
||||
"->", sce->name);
|
||||
}
|
||||
|
||||
return HANDLER_FINISHED;
|
||||
}
|
||||
|
||||
/* 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 (p->conf.etags_used && 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 HANDLER_FINISHED;
|
||||
}
|
||||
}
|
||||
|
||||
if (con->request.http_range && con->conf.range_requests) {
|
||||
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, p)) {
|
||||
con->http_status = 206;
|
||||
}
|
||||
return HANDLER_FINISHED;
|
||||
}
|
||||
}
|
||||
|
||||
/* 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, con->physical.path)) {
|
||||
con->http_status = 200;
|
||||
con->file_finished = 1;
|
||||
} else {
|
||||
con->http_status = 403;
|
||||
}
|
||||
if (!p->conf.etags_used) con->etag_flags = 0;
|
||||
http_response_send_file(srv, con, con->physical.path);
|
||||
|
||||
return HANDLER_FINISHED;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -16,6 +16,7 @@ int response_header_append(server *srv, connection *con, const char *key, size_t
|
|||
handler_t http_response_prepare(server *srv, connection *con);
|
||||
int http_response_redirect_to_directory(server *srv, connection *con);
|
||||
int http_response_handle_cachable(server *srv, connection *con, buffer * mtime);
|
||||
void http_response_send_file (server *srv, connection *con, buffer *path);
|
||||
|
||||
buffer * strftime_cache_get(server *srv, time_t last_mod);
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue