ui-plain.c

   1 /* ui-plain.c: functions for output of plain blobs by path
   2  *
   3  * Copyright (C) 2008 Lars Hjemli
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include <stdio.h>
  10 #include "cgit.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 struct walk_tree_context {
  15         int match_baselen;
  16         int match;
  17 };
  18
  19 static char *get_mimetype_from_file(const char *filename, const char *ext)
  20 {
  21         static const char *delimiters;
  22         char *result;
  23         FILE *fd;
  24         char line[1024];
  25         char *mimetype;
  26         char *token;
  27
  28         if (!filename)
  29                 return NULL;
  30
  31         fd = fopen(filename, "r");
  32         if (!fd)
  33                 return NULL;
  34
  35         delimiters = " \t\r\n";
  36         result = NULL;
  37
  38         /* loop over all lines in the file */
  39         while (!result && fgets(line, sizeof(line), fd)) {
  40                 mimetype = strtok(line, delimiters);
  41
  42                 /* skip empty lines and comment lines */
  43                 if (!mimetype || (mimetype[0] == '#'))
  44                         continue;
  45
  46                 /* loop over all extensions of mimetype */
  47                 while ((token = strtok(NULL, delimiters))) {
  48                         if (!strcasecmp(ext, token)) {
  49                                 result = xstrdup(mimetype);
  50                                 break;
  51                         }
  52                 }
  53         }
  54         fclose(fd);
  55
  56         return result;
  57 }
  58
  59 static int print_object(const unsigned char *sha1, const char *path)
  60 {
  61         enum object_type type;
  62         char *buf, *ext;
  63         unsigned long size;
  64         struct string_list_item *mime;
  65         int freemime;
  66
  67         type = sha1_object_info(sha1, &size);
  68         if (type == OBJ_BAD) {
  69                 html_status(404, "Not found", 0);
  70                 return 0;
  71         }
  72
  73         buf = read_sha1_file(sha1, &type, &size);
  74         if (!buf) {
  75                 html_status(404, "Not found", 0);
  76                 return 0;
  77         }
  78         ctx.page.mimetype = NULL;
  79         ext = strrchr(path, '.');
  80         freemime = 0;
  81         if (ext && *(++ext)) {
  82                 mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
  83                 if (mime) {
  84                         ctx.page.mimetype = (char *)mime->util;
  85                 } else {
  86                         ctx.page.mimetype = get_mimetype_from_file(ctx.cfg.mimetype_file, ext);
  87                         if (ctx.page.mimetype)
  88                                 freemime = 1;
  89                 }
  90         }
  91         if (!ctx.page.mimetype) {
  92                 if (buffer_is_binary(buf, size))
  93                         ctx.page.mimetype = "application/octet-stream";
  94                 else
  95                         ctx.page.mimetype = "text/plain";
  96         }
  97         ctx.page.filename = fmt("%s", path);
  98         ctx.page.size = size;
  99         ctx.page.etag = sha1_to_hex(sha1);
 100         cgit_print_http_headers(&ctx);
 101         html_raw(buf, size);
 102         if (freemime)
 103                 free(ctx.page.mimetype);
 104         return 1;
 105 }
 106
 107 static char *buildpath(const char *base, int baselen, const char *path)
 108 {
 109         if (path[0])
 110                 return fmt("%.*s%s/", baselen, base, path);
 111         else
 112                 return fmt("%.*s/", baselen, base);
 113 }
 114
 115 static void print_dir(const unsigned char *sha1, const char *base,
 116                       int baselen, const char *path)
 117 {
 118         char *fullpath, *slash;
 119         size_t len;
 120
 121         fullpath = buildpath(base, baselen, path);
 122         slash = (fullpath[0] == '/' ? "" : "/");
 123         ctx.page.etag = sha1_to_hex(sha1);
 124         cgit_print_http_headers(&ctx);
 125         htmlf("<html><head><title>%s", slash);
 126         html_txt(fullpath);
 127         htmlf("</title></head>\n<body>\n<h2>%s", slash);
 128         html_txt(fullpath);
 129         html("</h2>\n<ul>\n");
 130         len = strlen(fullpath);
 131         if (len > 1) {
 132                 fullpath[len - 1] = 0;
 133                 slash = strrchr(fullpath, '/');
 134                 if (slash)
 135                         *(slash + 1) = 0;
 136                 else
 137                         fullpath = NULL;
 138                 html("<li>");
 139                 cgit_plain_link("../", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
 140                                 fullpath);
 141                 html("</li>\n");
 142         }
 143 }
 144
 145 static void print_dir_entry(const unsigned char *sha1, const char *base,
 146                             int baselen, const char *path, unsigned mode)
 147 {
 148         char *fullpath;
 149
 150         fullpath = buildpath(base, baselen, path);
 151         if (!S_ISDIR(mode) && !S_ISGITLINK(mode))
 152                 fullpath[strlen(fullpath) - 1] = 0;
 153         html("  <li>");
 154         if (S_ISGITLINK(mode)) {
 155                 cgit_submodule_link(NULL, fullpath, sha1_to_hex(sha1));
 156         } else
 157                 cgit_plain_link(path, NULL, NULL, ctx.qry.head, ctx.qry.sha1,
 158                                 fullpath);
 159         html("</li>\n");
 160 }
 161
 162 static void print_dir_tail(void)
 163 {
 164         html(" </ul>\n</body></html>\n");
 165 }
 166
 167 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
 168                      const char *pathname, unsigned mode, int stage,
 169                      void *cbdata)
 170 {
 171         struct walk_tree_context *walk_tree_ctx = cbdata;
 172
 173         if (baselen == walk_tree_ctx->match_baselen) {
 174                 if (S_ISREG(mode)) {
 175                         if (print_object(sha1, pathname))
 176                                 walk_tree_ctx->match = 1;
 177                 } else if (S_ISDIR(mode)) {
 178                         print_dir(sha1, base, baselen, pathname);
 179                         walk_tree_ctx->match = 2;
 180                         return READ_TREE_RECURSIVE;
 181                 }
 182         } else if (baselen > walk_tree_ctx->match_baselen) {
 183                 print_dir_entry(sha1, base, baselen, pathname, mode);
 184                 walk_tree_ctx->match = 2;
 185         } else if (S_ISDIR(mode)) {
 186                 return READ_TREE_RECURSIVE;
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int basedir_len(const char *path)
 193 {
 194         char *p = strrchr(path, '/');
 195         if (p)
 196                 return p - path + 1;
 197         return 0;
 198 }
 199
 200 void cgit_print_plain(struct cgit_context *ctx)
 201 {
 202         const char *rev = ctx->qry.sha1;
 203         unsigned char sha1[20];
 204         struct commit *commit;
 205         struct pathspec_item path_items = {
 206                 .match = ctx->qry.path,
 207                 .len = ctx->qry.path ? strlen(ctx->qry.path) : 0
 208         };
 209         struct pathspec paths = {
 210                 .nr = 1,
 211                 .items = &path_items
 212         };
 213         struct walk_tree_context walk_tree_ctx = {
 214                 .match = 0
 215         };
 216
 217         if (!rev)
 218                 rev = ctx->qry.head;
 219
 220         if (get_sha1(rev, sha1)) {
 221                 html_status(404, "Not found", 0);
 222                 return;
 223         }
 224         commit = lookup_commit_reference(sha1);
 225         if (!commit || parse_commit(commit)) {
 226                 html_status(404, "Not found", 0);
 227                 return;
 228         }
 229         if (!path_items.match) {
 230                 path_items.match = "";
 231                 walk_tree_ctx.match_baselen = -1;
 232                 print_dir(commit->tree->object.sha1, "", 0, "");
 233                 walk_tree_ctx.match = 2;
 234         }
 235         else
 236                 walk_tree_ctx.match_baselen = basedir_len(path_items.match);
 237         read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 238         if (!walk_tree_ctx.match)
 239                 html_status(404, "Not found", 0);
 240         else if (walk_tree_ctx.match == 2)
 241                 print_dir_tail();
 242 }