zls/src/Header.zig
Techatrix c718e12d16
Autofix improvements (#879)
* improve autofix stability and client support

* run zig fmt
2023-01-02 14:59:01 -05:00

58 lines
2.2 KiB
Zig

const std = @import("std");
const Header = @This();
content_length: usize,
/// null implies "application/vscode-jsonrpc; charset=utf-8"
content_type: ?[]const u8 = null,
pub fn deinit(self: @This(), allocator: std.mem.Allocator) void {
if (self.content_type) |ct| allocator.free(ct);
}
// Caller owns returned memory.
pub fn parse(allocator: std.mem.Allocator, include_carriage_return: bool, reader: anytype) !Header {
var r = Header{
.content_length = undefined,
.content_type = null,
};
errdefer r.deinit(allocator);
var has_content_length = false;
while (true) {
const header = try reader.readUntilDelimiterAlloc(allocator, '\n', 0x100);
defer allocator.free(header);
if (include_carriage_return) {
if (header.len == 0 or header[header.len - 1] != '\r') return error.MissingCarriageReturn;
if (header.len == 1) break;
} else {
if (header.len == 0) break;
}
const header_name = header[0 .. std.mem.indexOf(u8, header, ": ") orelse return error.MissingColon];
const header_value = header[header_name.len + 2 .. header.len - @boolToInt(include_carriage_return)];
if (std.mem.eql(u8, header_name, "Content-Length")) {
if (header_value.len == 0) return error.MissingHeaderValue;
r.content_length = std.fmt.parseInt(usize, header_value, 10) catch return error.InvalidContentLength;
has_content_length = true;
} else if (std.mem.eql(u8, header_name, "Content-Type")) {
r.content_type = try allocator.dupe(u8, header_value);
} else {
return error.UnknownHeader;
}
}
if (!has_content_length) return error.MissingContentLength;
return r;
}
pub fn write(header: Header, include_carriage_return: bool, writer: anytype) @TypeOf(writer).Error!void {
const seperator: []const u8 = if (include_carriage_return) "\r\n" else "\n";
try writer.print("Content-Length: {}{s}", .{ header.content_length, seperator });
if (header.content_type) |content_type| {
try writer.print("Content-Type: {s}{s}", .{ content_type, seperator });
}
try writer.writeAll(seperator);
}