116 lines
2.6 KiB
Hare
116 lines
2.6 KiB
Hare
use bufio;
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use encoding::utf8;
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use errors;
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use fmt;
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use io;
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use net::dial;
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use net::uri;
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use net;
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use os;
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use strconv;
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use strings;
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// Performs an HTTP [[request]] with the given [[client]]. The request is
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// performed synchronously; this function blocks until the server has returned
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// the response status and all HTTP headers associated with the response.
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export fn do(client: *client, req: *request) (response | error) = {
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assert(req.target.scheme == "http"); // TODO: https
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const conn = dial::dial_uri("tcp", req.target)?;
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let buf: [os::BUFSIZ]u8 = [0...];
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let file = bufio::buffered(conn, [], buf);
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bufio::setflush(&file, []);
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fmt::fprintf(&file, "{} ", req.method)?;
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// TODO: Support other request-targets than origin-form
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const target = uri_origin_form(req.target);
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uri::fmt(&file, &target)?;
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fmt::fprintf(&file, " HTTP/1.1\r\n")?;
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// TODO: Handle Content-Length and Transfer-Encoding chunked/gzip
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// properly
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write_header(&file, &req.header)?;
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fmt::fprintf(&file, "\r\n")?;
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bufio::flush(&file)?;
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match (req.body) {
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case let body: io::handle =>
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// Copy to conn directly so we can use sendfile(2) if
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// appropriate
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io::copy(conn, body)?;
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case void =>
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yield;
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};
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let resp = response { ... };
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const scan = bufio::newscanner_static(conn, buf);
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read_statusline(&resp, &scan)?;
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read_header(&resp.header, &scan)?;
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const remain = bufio::scan_buffer(&scan);
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const rd = alloc(reader {
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vtable = &reader_vtable,
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conn = conn,
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...
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});
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rd.buffer[..len(remain)] = remain[..];
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rd.pending = len(remain);
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resp.body = rd;
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return resp;
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};
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fn read_statusline(
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resp: *response,
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scan: *bufio::scanner,
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) (void | error) = {
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const status = match (bufio::scan_string(scan, "\r\n")) {
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case let line: const str =>
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yield line;
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case let err: io::error =>
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return err;
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case utf8::invalid =>
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return protoerr;
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case io::EOF =>
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return protoerr;
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};
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const tok = strings::tokenize(status, " ");
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const version = match (strings::next_token(&tok)) {
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case let ver: str =>
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yield ver;
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case void =>
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return protoerr;
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};
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const status = match (strings::next_token(&tok)) {
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case let status: str =>
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yield status;
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case void =>
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return protoerr;
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};
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const reason = match (strings::next_token(&tok)) {
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case let reason: str =>
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yield reason;
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case void =>
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return protoerr;
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};
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const (_, version) = strings::cut(version, "/");
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const (major, minor) = strings::cut(version, ".");
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resp.version = (
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strconv::stou(major)!,
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strconv::stou(minor)!,
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);
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if (resp.version.0 > 1) {
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return errors::unsupported;
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};
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resp.status = strconv::stou(status)!;
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resp.reason = strings::dup(reason);
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};
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