404未找到-缺少一个blob diff参数

Question

在本地的ikiwiki上，我使用gitweb浏览文件历史记录。如果我在ikiwiki中单击history，然后在gitweb中单击diff to current，它将指向一个URL，如下所示：

http://localhost/gitweb/gitweb.cgi?p=.git;a=blobdiff;f=index.mdwn;h=0622da9b56b6a4f79388f3dc539d4c7d603ae4e9;hp=619d6d14eaf36b6bff80f7b68ce4f139fa0de9b2;hpb=000825c005ffc4c62279509119d80f1262023338

并显示错误消息：

404未找到-缺少一个blob diff参数

然而，blob和commitdiff是有效的。

有什么办法解决这个问题吗？

Answer 1

下面是来自最新源代码root/gitweb/gitweb.perl的代码片段

# preparing $fd and %diffinfo for git_patchset_body
# new style URI
if (defined $hash_base && defined $hash_parent_base) {
    if (defined $file_name) {
        # read raw output
        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
            $hash_parent_base, $hash_base,
            "--", (defined $file_parent ? $file_parent : ()), $file_name
            or die_error(500, "Open git-diff-tree failed");
        @difftree = map { chomp; $_ } <$fd>;
        close $fd
            or die_error(404, "Reading git-diff-tree failed");
        @difftree
            or die_error(404, "Blob diff not found");

    } elsif (defined $hash &&
             $hash =~ /[0-9a-fA-F]{40}/) {
        # try to find filename from $hash

        # read filtered raw output
        open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
            $hash_parent_base, $hash_base, "--"
            or die_error(500, "Open git-diff-tree failed");
        @difftree =
            # ':100644 100644 03b21826... 3b93d5e7... M    ls-files.c'
            # $hash == to_id
            grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
            map { chomp; $_ } <$fd>;
        close $fd
            or die_error(404, "Reading git-diff-tree failed");
        @difftree
            or die_error(404, "Blob diff not found");

    } else {
        die_error(400, "Missing one of the blob diff parameters");
    }

    if (@difftree > 1) {
        die_error(400, "Ambiguous blob diff specification");
    }

    %diffinfo = parse_difftree_raw_line($difftree[0]);
    $file_parent ||= $diffinfo{'from_file'} || $file_name;
    $file_name   ||= $diffinfo{'to_file'};

    $hash_parent ||= $diffinfo{'from_id'};
    $hash        ||= $diffinfo{'to_id'};

    # non-textual hash id's can be cached
    if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
        $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
        $expires = '+1d';
    }

    # open patch output
    open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
        '-p', ($format eq 'html' ? "--full-index" : ()),
        $hash_parent_base, $hash_base,
        "--", (defined $file_parent ? $file_parent : ()), $file_name
        or die_error(500, "Open git-diff-tree failed");
}

# old/legacy style URI
if (!%diffinfo && # if new style URI failed
    defined $hash && defined $hash_parent) {
    # fake git-diff-tree raw output
    $diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
    $diffinfo{'from_id'} = $hash_parent;
    $diffinfo{'to_id'}   = $hash;
    if (defined $file_name) {
        if (defined $file_parent) {
            $diffinfo{'status'} = '2';
            $diffinfo{'from_file'} = $file_parent;
            $diffinfo{'to_file'}   = $file_name;
        } else { # assume not renamed
            $diffinfo{'status'} = '1';
            $diffinfo{'from_file'} = $file_name;
            $diffinfo{'to_file'}   = $file_name;
        }
    } else { # no filename given
        $diffinfo{'status'} = '2';
        $diffinfo{'from_file'} = $hash_parent;
        $diffinfo{'to_file'}   = $hash;
    }

    # non-textual hash id's can be cached
    if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
        $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
        $expires = '+1d';
    }

    # open patch output
    open $fd, "-|", git_cmd(), "diff", @diff_opts,
        '-p', ($format eq 'html' ? "--full-index" : ()),
        $hash_parent, $hash, "--"
        or die_error(500, "Open git-diff failed");
} else  {
    die_error(400, "Missing one of the blob diff parameters")
        unless %diffinfo;
}

下面还有其他代码片段(省略了无关代码)用于参数解析：

our $file_name = $cgi->param('f');
our $hash = $cgi->param('h');
our $hash_parent = $cgi->param('hp');
our $hash_base = $cgi->param('hb');
our $hash_parent_base = $cgi->param('hpb');

因此，以下内容是假的：

defined $hash_base 

不幸的是，这些是我的全部。

根据上述代码，预计不会出现例外情况。

然而，你的gitweb可能不是最新的。我建议你查查你的消息来源。