ui-blob.c

   1 /* ui-blob.c: show blob content
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-blob.h"
  11 #include "html.h"
  12 #include "ui-shared.h"
  13
  14 struct walk_tree_context {
  15         const char *match_path;
  16         unsigned char *matched_sha1;
  17         unsigned int found_path:1;
  18         unsigned int file_only:1;
  19 };
  20
  21 static int walk_tree(const unsigned char *sha1, struct strbuf *base,
  22                 const char *pathname, unsigned mode, int stage, void *cbdata)
  23 {
  24         struct walk_tree_context *walk_tree_ctx = cbdata;
  25
  26         if (walk_tree_ctx->file_only && !S_ISREG(mode))
  27                 return READ_TREE_RECURSIVE;
  28         if (strncmp(base->buf, walk_tree_ctx->match_path, base->len)
  29                 || strcmp(walk_tree_ctx->match_path + base->len, pathname))
  30                 return READ_TREE_RECURSIVE;
  31         memmove(walk_tree_ctx->matched_sha1, sha1, 20);
  32         walk_tree_ctx->found_path = 1;
  33         return 0;
  34 }
  35
  36 int cgit_ref_path_exists(const char *path, const char *ref, int file_only)
  37 {
  38         unsigned char sha1[20];
  39         unsigned long size;
  40         struct pathspec_item path_items = {
  41                 .match = path,
  42                 .len = strlen(path)
  43         };
  44         struct pathspec paths = {
  45                 .nr = 1,
  46                 .items = &path_items
  47         };
  48         struct walk_tree_context walk_tree_ctx = {
  49                 .match_path = path,
  50                 .matched_sha1 = sha1,
  51                 .found_path = 0,
  52                 .file_only = file_only
  53         };
  54
  55         if (get_sha1(ref, sha1))
  56                 return 0;
  57         if (sha1_object_info(sha1, &size) != OBJ_COMMIT)
  58                 return 0;
  59         read_tree_recursive(lookup_commit_reference(sha1)->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  60         return walk_tree_ctx.found_path;
  61 }
  62
  63 int cgit_print_file(char *path, const char *head, int file_only)
  64 {
  65         unsigned char sha1[20];
  66         enum object_type type;
  67         char *buf;
  68         unsigned long size;
  69         struct commit *commit;
  70         struct pathspec_item path_items = {
  71                 .match = path,
  72                 .len = strlen(path)
  73         };
  74         struct pathspec paths = {
  75                 .nr = 1,
  76                 .items = &path_items
  77         };
  78         struct walk_tree_context walk_tree_ctx = {
  79                 .match_path = path,
  80                 .matched_sha1 = sha1,
  81                 .found_path = 0,
  82                 .file_only = file_only
  83         };
  84
  85         if (get_sha1(head, sha1))
  86                 return -1;
  87         type = sha1_object_info(sha1, &size);
  88         if (type == OBJ_COMMIT) {
  89                 commit = lookup_commit_reference(sha1);
  90                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  91                 if (!walk_tree_ctx.found_path)
  92                         return -1;
  93                 type = sha1_object_info(sha1, &size);
  94         }
  95         if (type == OBJ_BAD)
  96                 return -1;
  97         buf = read_sha1_file(sha1, &type, &size);
  98         if (!buf)
  99                 return -1;
 100         buf[size] = '\0';
 101         html_raw(buf, size);
 102         free(buf);
 103         return 0;
 104 }
 105
 106 void cgit_print_blob(const char *hex, char *path, const char *head, int file_only)
 107 {
 108         unsigned char sha1[20];
 109         enum object_type type;
 110         char *buf;
 111         unsigned long size;
 112         struct commit *commit;
 113         struct pathspec_item path_items = {
 114                 .match = path,
 115                 .len = path ? strlen(path) : 0
 116         };
 117         struct pathspec paths = {
 118                 .nr = 1,
 119                 .items = &path_items
 120         };
 121         struct walk_tree_context walk_tree_ctx = {
 122                 .match_path = path,
 123                 .matched_sha1 = sha1,
 124                 .found_path = 0,
 125                 .file_only = file_only
 126         };
 127
 128         if (hex) {
 129                 if (get_sha1_hex(hex, sha1)) {
 130                         cgit_print_error_page(400, "Bad request",
 131                                         "Bad hex value: %s", hex);
 132                         return;
 133                 }
 134         } else {
 135                 if (get_sha1(head, sha1)) {
 136                         cgit_print_error_page(404, "Not found",
 137                                         "Bad ref: %s", head);
 138                         return;
 139                 }
 140         }
 141
 142         type = sha1_object_info(sha1, &size);
 143
 144         if ((!hex) && type == OBJ_COMMIT && path) {
 145                 commit = lookup_commit_reference(sha1);
 146                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 147                 type = sha1_object_info(sha1,&size);
 148         }
 149
 150         if (type == OBJ_BAD) {
 151                 cgit_print_error_page(404, "Not found",
 152                                 "Bad object name: %s", hex);
 153                 return;
 154         }
 155
 156         buf = read_sha1_file(sha1, &type, &size);
 157         if (!buf) {
 158                 cgit_print_error_page(500, "Internal server error",
 159                                 "Error reading object %s", hex);
 160                 return;
 161         }
 162
 163         buf[size] = '\0';
 164         ctx.page.mimetype = ctx.qry.mimetype;
 165         if (!ctx.page.mimetype) {
 166                 if (buffer_is_binary(buf, size))
 167                         ctx.page.mimetype = "application/octet-stream";
 168                 else
 169                         ctx.page.mimetype = "text/plain";
 170         }
 171         ctx.page.filename = path;
 172         cgit_print_http_headers();
 173         html_raw(buf, size);
 174 }