45 lines
1.6 KiB
Zig
45 lines
1.6 KiB
Zig
const std = @import("std");
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const mem = std.mem;
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const RequestHeader = struct {
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content_length: usize,
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/// null implies "application/vscode-jsonrpc; charset=utf-8"
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content_type: ?[]const u8,
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pub fn deinit(self: @This(), allocator: *mem.Allocator) void {
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if (self.content_type) |ct| allocator.free(ct);
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}
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};
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pub fn readRequestHeader(allocator: *mem.Allocator, instream: anytype) !RequestHeader {
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var r = RequestHeader{
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.content_length = undefined,
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.content_type = null,
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};
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errdefer r.deinit(allocator);
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var has_content_length = false;
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while (true) {
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const header = try instream.readUntilDelimiterAlloc(allocator, '\n', 0x100);
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defer allocator.free(header);
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if (header.len == 0 or header[header.len - 1] != '\r') return error.MissingCarriageReturn;
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if (header.len == 1) break;
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const header_name = header[0 .. mem.indexOf(u8, header, ": ") orelse return error.MissingColon];
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const header_value = header[header_name.len + 2 .. header.len - 1];
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if (mem.eql(u8, header_name, "Content-Length")) {
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if (header_value.len == 0) return error.MissingHeaderValue;
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r.content_length = std.fmt.parseInt(usize, header_value, 10) catch return error.InvalidContentLength;
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has_content_length = true;
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} else if (mem.eql(u8, header_name, "Content-Type")) {
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r.content_type = try mem.dupe(allocator, u8, header_value);
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} else {
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return error.UnknownHeader;
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}
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}
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if (!has_content_length) return error.MissingContentLength;
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return r;
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}
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