2b3e76a9f9
This provides a formatted error response rather than a simple HTTP error. Signed-off-by: John Keeping <john@keeping.me.uk>
250 řádky
5.7 KiB
C
250 řádky
5.7 KiB
C
/* ui-plain.c: functions for output of plain blobs by path
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*
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* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
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*
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* Licensed under GNU General Public License v2
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* (see COPYING for full license text)
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*/
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#include "cgit.h"
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#include "ui-plain.h"
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#include "html.h"
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#include "ui-shared.h"
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struct walk_tree_context {
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int match_baselen;
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int match;
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};
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static char *get_mimetype_from_file(const char *filename, const char *ext)
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{
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static const char *delimiters;
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char *result;
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FILE *fd;
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char line[1024];
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char *mimetype;
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char *token;
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if (!filename)
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return NULL;
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fd = fopen(filename, "r");
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if (!fd)
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return NULL;
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delimiters = " \t\r\n";
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result = NULL;
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/* loop over all lines in the file */
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while (!result && fgets(line, sizeof(line), fd)) {
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mimetype = strtok(line, delimiters);
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/* skip empty lines and comment lines */
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if (!mimetype || (mimetype[0] == '#'))
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continue;
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/* loop over all extensions of mimetype */
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while ((token = strtok(NULL, delimiters))) {
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if (!strcasecmp(ext, token)) {
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result = xstrdup(mimetype);
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break;
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}
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}
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}
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fclose(fd);
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return result;
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}
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static int print_object(const unsigned char *sha1, const char *path)
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{
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enum object_type type;
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char *buf, *ext;
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unsigned long size;
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struct string_list_item *mime;
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int freemime;
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type = sha1_object_info(sha1, &size);
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if (type == OBJ_BAD) {
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cgit_print_error_page(404, "Not found", "Not found");
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return 0;
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}
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf) {
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cgit_print_error_page(404, "Not found", "Not found");
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return 0;
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}
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ctx.page.mimetype = NULL;
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ext = strrchr(path, '.');
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freemime = 0;
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if (ext && *(++ext)) {
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mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
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if (mime) {
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ctx.page.mimetype = (char *)mime->util;
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ctx.page.charset = NULL;
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} else {
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ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);
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if (ctx.page.mimetype) {
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freemime = 1;
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ctx.page.charset = NULL;
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}
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}
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}
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if (!ctx.page.mimetype) {
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if (buffer_is_binary(buf, size)) {
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ctx.page.mimetype = "application/octet-stream";
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ctx.page.charset = NULL;
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} else {
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ctx.page.mimetype = "text/plain";
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}
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}
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ctx.page.filename = path;
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ctx.page.size = size;
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ctx.page.etag = sha1_to_hex(sha1);
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cgit_print_http_headers();
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html_raw(buf, size);
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/* If we allocated this, then casting away const is safe. */
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if (freemime)
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free((char*) ctx.page.mimetype);
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return 1;
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}
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static char *buildpath(const char *base, int baselen, const char *path)
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{
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if (path[0])
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return fmtalloc("%.*s%s/", baselen, base, path);
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else
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return fmtalloc("%.*s/", baselen, base);
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}
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static void print_dir(const unsigned char *sha1, const char *base,
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int baselen, const char *path)
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{
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char *fullpath, *slash;
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size_t len;
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fullpath = buildpath(base, baselen, path);
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slash = (fullpath[0] == '/' ? "" : "/");
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ctx.page.etag = sha1_to_hex(sha1);
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cgit_print_http_headers();
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htmlf("<html><head><title>%s", slash);
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html_txt(fullpath);
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htmlf("</title></head>\n<body>\n<h2>%s", slash);
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html_txt(fullpath);
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html("</h2>\n<ul>\n");
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len = strlen(fullpath);
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if (len > 1) {
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fullpath[len - 1] = 0;
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slash = strrchr(fullpath, '/');
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if (slash)
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*(slash + 1) = 0;
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else
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fullpath = NULL;
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html("<li>");
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cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
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fullpath);
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html("</li>\n");
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}
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free(fullpath);
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}
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static void print_dir_entry(const unsigned char *sha1, const char *base,
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int baselen, const char *path, unsigned mode)
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{
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char *fullpath;
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fullpath = buildpath(base, baselen, path);
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if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
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fullpath[strlen(fullpath) - 1] = 0;
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html(" <li>");
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if (S_ISGITLINK(mode)) {
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cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
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} else
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cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
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fullpath);
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html("</li>\n");
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free(fullpath);
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}
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static void print_dir_tail(void)
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{
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html(" </ul>\n</body></html>\n");
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}
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static int walk_tree(const unsigned char *sha1, struct strbuf *base,
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const char *pathname, unsigned mode, int stage, void *cbdata)
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{
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struct walk_tree_context *walk_tree_ctx = cbdata;
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if (base->len == walk_tree_ctx->match_baselen) {
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if (S_ISREG(mode)) {
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if (print_object(sha1, pathname))
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walk_tree_ctx->match = 1;
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} else if (S_ISDIR(mode)) {
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print_dir(sha1, base->buf, base->len, pathname);
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walk_tree_ctx->match = 2;
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return READ_TREE_RECURSIVE;
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}
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} else if (base->len > walk_tree_ctx->match_baselen) {
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print_dir_entry(sha1, base->buf, base->len, pathname, mode);
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walk_tree_ctx->match = 2;
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} else if (S_ISDIR(mode)) {
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return READ_TREE_RECURSIVE;
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}
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return 0;
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}
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static int basedir_len(const char *path)
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{
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char *p = strrchr(path, '/');
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if (p)
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return p - path + 1;
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return 0;
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}
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void cgit_print_plain(void)
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{
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const char *rev = ctx.qry.sha1;
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unsigned char sha1[20];
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struct commit *commit;
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struct pathspec_item path_items = {
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.match = ctx.qry.path,
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.len = ctx.qry.path ? strlen(ctx.qry.path) : 0
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};
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struct pathspec paths = {
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.nr = 1,
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.items = &path_items
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};
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struct walk_tree_context walk_tree_ctx = {
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.match = 0
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};
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if (!rev)
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rev = ctx.qry.head;
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if (get_sha1(rev, sha1)) {
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cgit_print_error_page(404, "Not found", "Not found");
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return;
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}
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commit = lookup_commit_reference(sha1);
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if (!commit || parse_commit(commit)) {
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cgit_print_error_page(404, "Not found", "Not found");
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return;
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}
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if (!path_items.match) {
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path_items.match = "";
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walk_tree_ctx.match_baselen = -1;
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print_dir(commit->tree->object.sha1, "", 0, "");
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walk_tree_ctx.match = 2;
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}
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else
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walk_tree_ctx.match_baselen = basedir_len(path_items.match);
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read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
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if (!walk_tree_ctx.match)
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cgit_print_error_page(404, "Not found", "Not found");
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else if (walk_tree_ctx.match == 2)
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print_dir_tail();
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}
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