gitweb.ps.run Git - ps-cgit/blob - ui-blob.c

   1 /* ui-blob.c: show blob content
   2  *
   3  * Copyright (C) 2008 Lars Hjemli
   4  * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "ui-blob.h"
  12 #include "html.h"
  13 #include "ui-shared.h"
  14
  15 struct walk_tree_context {
  16         const char *match_path;
  17         unsigned char *matched_sha1;
  18         int found_path;
  19 };
  20
  21 static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  22         const char *pathname, unsigned mode, int stage, void *cbdata)
  23 {
  24         struct walk_tree_context *walk_tree_ctx = cbdata;
  25
  26         if (strncmp(base, walk_tree_ctx->match_path, baselen)
  27                 || strcmp(walk_tree_ctx->match_path + baselen, pathname))
  28                 return READ_TREE_RECURSIVE;
  29         memmove(walk_tree_ctx->matched_sha1, sha1, 20);
  30         walk_tree_ctx->found_path = 1;
  31         return 0;
  32 }
  33
  34 int cgit_ref_path_exists(const char *path, const char *ref)
  35 {
  36         unsigned char sha1[20];
  37         unsigned long size;
  38         struct pathspec_item path_items = {
  39                 .match = path,
  40                 .len = strlen(path)
  41         };
  42         struct pathspec paths = {
  43                 .nr = 1,
  44                 .items = &path_items
  45         };
  46         struct walk_tree_context walk_tree_ctx = {
  47                 .match_path = path,
  48                 .matched_sha1 = sha1,
  49                 .found_path = 0
  50         };
  51
  52         if (get_sha1(ref, sha1))
  53                 return 0;
  54         if (sha1_object_info(sha1, &size) != OBJ_COMMIT)
  55                 return 0;
  56         read_tree_recursive(lookup_commit_reference(sha1)->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  57         return walk_tree_ctx.found_path;
  58 }
  59
  60 int cgit_print_file(char *path, const char *head)
  61 {
  62         unsigned char sha1[20];
  63         enum object_type type;
  64         char *buf;
  65         unsigned long size;
  66         struct commit *commit;
  67         struct pathspec_item path_items = {
  68                 .match = path,
  69                 .len = strlen(path)
  70         };
  71         struct pathspec paths = {
  72                 .nr = 1,
  73                 .items = &path_items
  74         };
  75         struct walk_tree_context walk_tree_ctx = {
  76                 .match_path = path,
  77                 .matched_sha1 = sha1,
  78                 .found_path = 0
  79         };
  80
  81         if (get_sha1(head, sha1))
  82                 return -1;
  83         type = sha1_object_info(sha1, &size);
  84         if (type == OBJ_COMMIT && path) {
  85                 commit = lookup_commit_reference(sha1);
  86                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
  87                 if (!walk_tree_ctx.found_path)
  88                         return -1;
  89                 type = sha1_object_info(sha1, &size);
  90         }
  91         if (type == OBJ_BAD)
  92                 return -1;
  93         buf = read_sha1_file(sha1, &type, &size);
  94         if (!buf)
  95                 return -1;
  96         buf[size] = '\0';
  97         html_raw(buf, size);
  98         return 0;
  99 }
 100
 101 void cgit_print_blob(const char *hex, char *path, const char *head)
 102 {
 103         unsigned char sha1[20];
 104         enum object_type type;
 105         char *buf;
 106         unsigned long size;
 107         struct commit *commit;
 108         struct pathspec_item path_items = {
 109                 .match = path,
 110                 .len = path ? strlen(path) : 0
 111         };
 112         struct pathspec paths = {
 113                 .nr = 1,
 114                 .items = &path_items
 115         };
 116         struct walk_tree_context walk_tree_ctx = {
 117                 .match_path = path,
 118                 .matched_sha1 = sha1,
 119         };
 120
 121         if (hex) {
 122                 if (get_sha1_hex(hex, sha1)) {
 123                         cgit_print_error("Bad hex value: %s", hex);
 124                         return;
 125                 }
 126         } else {
 127                 if (get_sha1(head, sha1)) {
 128                         cgit_print_error("Bad ref: %s", head);
 129                         return;
 130                 }
 131         }
 132
 133         type = sha1_object_info(sha1, &size);
 134
 135         if ((!hex) && type == OBJ_COMMIT && path) {
 136                 commit = lookup_commit_reference(sha1);
 137                 read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
 138                 type = sha1_object_info(sha1,&size);
 139         }
 140
 141         if (type == OBJ_BAD) {
 142                 cgit_print_error("Bad object name: %s", hex);
 143                 return;
 144         }
 145
 146         buf = read_sha1_file(sha1, &type, &size);
 147         if (!buf) {
 148                 cgit_print_error("Error reading object %s", hex);
 149                 return;
 150         }
 151
 152         buf[size] = '\0';
 153         ctx.page.mimetype = ctx.qry.mimetype;
 154         if (!ctx.page.mimetype) {
 155                 if (buffer_is_binary(buf, size))
 156                         ctx.page.mimetype = "application/octet-stream";
 157                 else
 158                         ctx.page.mimetype = "text/plain";
 159         }
 160         ctx.page.filename = path;
 161         cgit_print_http_headers(&ctx);
 162         html_raw(buf, size);
 163 }