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std.http: fix chunked header offset calculation

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This commit is contained in:
Andrew Kelley 2025-05-02 22:19:27 -07:00
parent e4126aa213
commit 847afd0a47
1 changed files with 6 additions and 5 deletions
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11
lib/std/http.zig
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@ -809,8 +809,9 @@ pub const BodyWriter = struct {
end,
pub const Chunked = union(enum) {
/// Index of the hex-encoded chunk length in the chunk header
/// within the buffer of `BodyWriter.http_protocol_output`.
/// Index to the start of the hex-encoded chunk length in the chunk
/// header within the buffer of `BodyWriter.http_protocol_output`.
/// Buffered chunk data starts here plus length of `chunk_header_template`.
offset: usize,
/// We are in the middle of a chunk and this is how many bytes are
/// left until the next header. This includes +2 for "\r"\n", and
@ -830,7 +831,7 @@ pub const BodyWriter = struct {
.end, .none, .content_length => return w.http_protocol_output.flush(),
.chunked => |*chunked| switch (chunked.*) {
.offset => |*offset| {
try w.http_protocol_output.flushLimit(.limited(w.http_protocol_output.end - offset.*));
try w.http_protocol_output.flushLimit(.limited(offset.*));
offset.* = 0;
},
.chunk_len => return w.http_protocol_output.flush(),
@ -1025,8 +1026,8 @@ pub const BodyWriter = struct {
},
.chunk_len => |chunk_len| l: switch (chunk_len) {
0 => {
const header_buf = try bw.writableArray(chunk_header_template.len);
const off = bw.end;
const header_buf = try bw.writableArray(chunk_header_template.len);
@memcpy(header_buf, chunk_header_template);
chunked.* = .{ .offset = off };
continue :state .{ .offset = off };
@ -1074,8 +1075,8 @@ pub const BodyWriter = struct {
},
.chunk_len => |chunk_len| l: switch (chunk_len) {
0 => {
const header_buf = try bw.writableArray(chunk_header_template.len);
const offset = bw.end;
const header_buf = try bw.writableArray(chunk_header_template.len);
@memcpy(header_buf, chunk_header_template);
chunked.* = .{ .offset = offset };
continue :state .{ .offset = offset };