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Jan-Erik Rediger 2024-06-01 16:46:01 +02:00
parent addeecebdb
commit a474d3e408
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[submodule "backend/vendor/hare-http"]
path = backend/vendor/hare-http
path = vendor/hare-http
url = https://git.fnordig.de/jer/hare-http.git
branch = host-in-uri
[submodule "backend/vendor/hare-logfmt"]
path = backend/vendor/hare-logfmt
path = vendor/hare-logfmt
url = https://git.sr.ht/~blainsmith/hare-logfmt
[submodule "backend/vendor/hare-json"]
path = backend/vendor/hare-json
path = vendor/hare-json
url = https://git.sr.ht/~sircmpwn/hare-json

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Subproject commit b6aeae96199607a1f3b4d437d5c99f821bd6a6b6

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Subproject commit 2b4a37459be54c83ac6ac6354cddec3e9fa796bf

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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.

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use getopt;
use io;
use log;
use net::dial;
use net::http;
use net::uri;
use os;
use strings;
const usage: [_]getopt::help = [
"HTTP client",
('H', "Name:value", "Sets an HTTP header"),
('X', "method", "Sets the HTTP method verb"),
"url"
];
export fn main() void = {
const client = http::newclient("Hare net::http test client");
defer http::client_finish(&client);
const cmd = getopt::parse(os::args, usage...);
defer getopt::finish(&cmd);
if (len(cmd.args) != 1) {
getopt::printusage(os::stderr, "http", usage)!;
os::exit(os::status::FAILURE);
};
const targ = match (uri::parse(cmd.args[0])) {
case let u: uri::uri =>
yield u;
case uri::invalid =>
log::fatal("Invalid URI");
};
defer uri::finish(&targ);
let req = http::new_request(&client, "GET", &targ)!;
for (let i = 0z; i < len(cmd.opts); i += 1) {
const (opt, val) = cmd.opts[i];
switch (opt) {
case 'H' =>
const (name, val) = strings::cut(val, ":");
http::header_add(&req.header, name, val);
case 'X' =>
req.method = val;
case => abort();
};
};
const resp = match (http::do(&client, &req)) {
case let err: http::error =>
log::fatal("HTTP error:", http::strerror(err));
case let resp: http::response =>
yield resp;
};
defer http::response_finish(&resp);
log::printfln("HTTP/{}.{}: {} {}",
resp.version.0, resp.version.1,
resp.status, resp.reason);
for (let i = 0z; i < len(resp.header); i += 1) {
const (name, val) = resp.header[i];
log::printfln("{}: {}", name, val);
};
const body = match (resp.body) {
case let st: *io::stream =>
yield st;
case null =>
return;
};
io::copy(os::stdout, body)!;
io::close(body)!;
};

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use getopt;
use net;
use net::ip;
use net::http;
use net::dial;
use os;
use memio;
use io;
use fmt;
use bufio;
use strings;
const usage: [_]getopt::help = [
"HTTP server",
('a', "address", "listened address (ex: 127.0.0.1:8080)")
];
export fn main() void = {
const cmd = getopt::parse(os::args, usage...);
defer getopt::finish(&cmd);
let port: u16 = 8080;
let ip_addr: ip::addr4 = [127, 0, 0, 1];
for (let i = 0z; i < len(cmd.opts); i += 1) {
const opt = cmd.opts[i];
switch (opt.0) {
case 'a' =>
match (dial::splitaddr(opt.1, "")) {
case let value: (str, u16) =>
ip_addr = ip::parsev4(value.0)!;
port = value.1;
case dial::invalid_address =>
abort("Invalid address");
};
case => abort(); // unreachable
};
};
const server = match (http::listen(ip_addr, port)) {
case let this: *http::server =>
yield this;
case net::error => abort("failure while listening");
};
defer http::server_finish(server);
for (true) {
const serv_req = match (http::serve(server)) {
case let this: *http::server_request =>
yield this;
case net::error => abort("failure while serving");
};
defer http::serve_finish(serv_req);
let buf = memio::dynamic();
defer io::close(&buf)!;
handlereq(&buf, &serv_req.request);
http::response_write(
serv_req.socket,
http::STATUS_OK,
&buf,
("Content-Type", "text/plain")
)!;
};
};
export fn handlereq(buf: *io::stream, request: *http::request) void = {
fmt::fprintfln(buf, "Method: {}", request.method)!;
fmt::fprintfln(buf, "Path: {}", request.target.path)!;
fmt::fprintfln(buf, "Fragment: {}", request.target.fragment)!;
fmt::fprintfln(buf, "Query: {}", request.target.query)!;
fmt::fprintfln(buf, "Headers: <<EOF")!;
http::write_header(buf, &request.header)!;
fmt::fprintfln(buf, "EOF")!;
match (request.body) {
case void => void;
case let body: io::handle =>
fmt::fprintfln(buf, "Body: <<EOF")!;
for (true) {
match (bufio::read_line(body)!) {
case let line: []u8 =>
fmt::fprintln(buf, strings::fromutf8(line)!)!;
break;
case io::EOF =>
break;
};
};
fmt::fprintfln(buf, "EOF")!;
};
};

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net::http provides an implementation of an HTTP 1.1 client and server as defined
by RFC 9110 et al.
TODO: Flesh me out
Caveats:
- No attempt is made to validate that the input for client requests or responses
are valid according to the HTTP grammar; such cases will fail when rejected by
the other party.
- Details indicated by RFC 7230 et al as "obsolete" are not implemented
- Max header length including "name: value" is 4KiB
TODO:
- Server stuff
- TLS

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use io;
use net::uri;
export type client = struct {
default_header: header,
default_transport: transport,
};
// Creates a new HTTP [[client]] with the provided User-Agent string.
//
// The HTTP client implements a number of sane defaults, which may be tuned. The
// set of default headers is configured with [[client_default_header]], and the
// default transport behavior with [[client_default_transport]].
//
// TODO: Implement and document the connection pool
//
// The caller must pass the client object to [[client_finish]] to free resources
// associated with this client after use.
export fn newclient(ua: str) client = {
let client = client { ... };
header_add(&client, "User-Agent", ua);
return client;
};
// Frees resources associated with an HTTP [[client]].
export fn client_finish(client: *client) void = {
header_free(&client.default_header);
};
// Returns the default headers used by this HTTP client, so that the user can
// examine or modify the net::http defaults (such as User-Agent or
// Accept-Encoding), or add their own.
export fn client_default_header(client: *client) *header = {
return &client.default_header;
};
// Returns the default [[transport]] configuration used by this HTTP client.
export fn client_default_transport(client: *client) *transport = {
return &client.default_transport;
};
fn uri_origin_form(target: *uri::uri) uri::uri = {
let target = *target;
target.scheme = "";
target.host = "";
target.fragment = "";
target.userinfo = "";
target.port = 0;
if (target.path == "") {
target.path = "/";
};
return target;
};
// Performs a synchronous HTTP GET request with the given client.
export fn get(client: *client, target: *uri::uri) (response | error) = {
const req = new_request(client, GET, target)?;
defer request_finish(&req);
return do(client, &req);
};
// Performs a synchronous HTTP HEAD request with the given client.
export fn head(client: *client, target: *uri::uri) (response | error) = {
const req = new_request(client, HEAD, target)?;
defer request_finish(&req);
return do(client, &req);
};
// Performs a synchronous HTTP POST request with the given client.
//
// If the provided I/O handle is seekable, the Content-Length header is added
// automatically. Otherwise, Transfer-Encoding: chunked will be used.
export fn post(
client: *client,
target: *uri::uri,
body: io::handle,
) (response | error) = {
const req = new_request_body(client, POST, target, body)?;
defer request_finish(&req);
return do(client, &req);
};
// Performs a synchronous HTTP PUT request with the given client.
//
// If the provided I/O handle is seekable, the Content-Length header is added
// automatically. Otherwise, Transfer-Encoding: chunked will be used.
export fn put(
client: *client,
target: *uri::uri,
body: io::handle,
) (response | error) = {
const req = new_request_body(client, PUT, target, body)?;
defer request_finish(&req);
return do(client, &req);
};

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// HTTP "GET" method.
export def GET: str = "GET";
// HTTP "HEAD" method.
export def HEAD: str = "HEAD";
// HTTP "POST" method.
export def POST: str = "POST";
// HTTP "PUT" method.
export def PUT: str = "PUT";
// HTTP "DELETE" method.
export def DELETE: str = "DELETE";
// HTTP "OPTIONS" method.
export def OPTIONS: str = "OPTIONS";
// HTTP "PATCH" method.
export def PATCH: str = "PATCH";
// HTTP "CONNECT" method.
export def CONNECT: str = "CONNECT";
// HTTP "Continue" response status (100).
export def STATUS_CONTINUE: uint = 100;
// HTTP "Switching Protocols" response status (101).
export def STATUS_SWITCHING_PROTOCOLS: uint = 101;
// HTTP "OK" response status (200).
export def STATUS_OK: uint = 200;
// HTTP "Created" response status (201).
export def STATUS_CREATED: uint = 201;
// HTTP "Accepted" response status (202).
export def STATUS_ACCEPTED: uint = 202;
// HTTP "Non-authoritative Info" response status (203).
export def STATUS_NONAUTHORITATIVE_INFO: uint = 203;
// HTTP "No Content" response status (204).
export def STATUS_NO_CONTENT: uint = 204;
// HTTP "Reset Content" response status (205).
export def STATUS_RESET_CONTENT: uint = 205;
// HTTP "Partial Content" response status (206).
export def STATUS_PARTIAL_CONTENT: uint = 206;
// HTTP "Multiple Choices" response status (300).
export def STATUS_MULTIPLE_CHOICES: uint = 300;
// HTTP "Moved Permanently" response status (301).
export def STATUS_MOVED_PERMANENTLY: uint = 301;
// HTTP "Found" response status (302).
export def STATUS_FOUND: uint = 302;
// HTTP "See Other" response status (303).
export def STATUS_SEE_OTHER: uint = 303;
// HTTP "Not Modified" response status (304).
export def STATUS_NOT_MODIFIED: uint = 304;
// HTTP "Use Proxy" response status (305).
export def STATUS_USE_PROXY: uint = 305;
// HTTP "Temporary Redirect" response status (307).
export def STATUS_TEMPORARY_REDIRECT: uint = 307;
// HTTP "Permanent Redirect" response status (308).
export def STATUS_PERMANENT_REDIRECT: uint = 308;
// HTTP "Bad Request" response status (400).
export def STATUS_BAD_REQUEST: uint = 400;
// HTTP "Unauthorized" response status (401).
export def STATUS_UNAUTHORIZED: uint = 401;
// HTTP "Payment Required" response status (402).
export def STATUS_PAYMENT_REQUIRED: uint = 402;
// HTTP "Forbidden" response status (403).
export def STATUS_FORBIDDEN: uint = 403;
// HTTP "Not Found" response status (404).
export def STATUS_NOT_FOUND: uint = 404;
// HTTP "Method Not Allowed" response status (405).
export def STATUS_METHOD_NOT_ALLOWED: uint = 405;
// HTTP "Not Acceptable" response status (406).
export def STATUS_NOT_ACCEPTABLE: uint = 406;
// HTTP "Proxy Authentication Required" response status (407).
export def STATUS_PROXY_AUTH_REQUIRED: uint = 407;
// HTTP "Request Timeout" response status (408).
export def STATUS_REQUEST_TIMEOUT: uint = 408;
// HTTP "Conflict" response status (409).
export def STATUS_CONFLICT: uint = 409;
// HTTP "Gone" response status (410).
export def STATUS_GONE: uint = 410;
// HTTP "Length Required" response status (411).
export def STATUS_LENGTH_REQUIRED: uint = 411;
// HTTP "Precondition Failed" response status (412).
export def STATUS_PRECONDITION_FAILED: uint = 412;
// HTTP "Request Entity Too Large" response status (413).
export def STATUS_REQUEST_ENTITY_TOO_LARGE: uint = 413;
// HTTP "Request URI Too Long" response status (414).
export def STATUS_REQUEST_URI_TOO_LONG: uint = 414;
// HTTP "Unsupported Media Type" response status (415).
export def STATUS_UNSUPPORTED_MEDIA_TYPE: uint = 415;
// HTTP "Requested Range Not Satisfiable" response status (416).
export def STATUS_REQUESTED_RANGE_NOT_SATISFIABLE: uint = 416;
// HTTP "Expectation Failed" response status (417).
export def STATUS_EXPECTATION_FAILED: uint = 417;
// HTTP "I'm a Teapot" response status (418).
export def STATUS_TEAPOT: uint = 418;
// HTTP "Misdirected Request" response status (421).
export def STATUS_MISDIRECTED_REQUEST: uint = 421;
// HTTP "Unprocessable Entity" response status (422).
export def STATUS_UNPROCESSABLE_ENTITY: uint = 422;
// HTTP "Upgrade Required" response status (426).
export def STATUS_UPGRADE_REQUIRED: uint = 426;
// HTTP "Internal Server Error" response status (500).
export def STATUS_INTERNAL_SERVER_ERROR: uint = 500;
// HTTP "Not Implemented" response status (501).
export def STATUS_NOT_IMPLEMENTED: uint = 501;
// HTTP "Bad Gateway" response status (502).
export def STATUS_BAD_GATEWAY: uint = 502;
// HTTP "Service Unavailable" response status (503).
export def STATUS_SERVICE_UNAVAILABLE: uint = 503;
// HTTP "Gateway Timeout" response status (504).
export def STATUS_GATEWAY_TIMEOUT: uint = 504;
// HTTP "HTTP Version Not Supported" response status (505).
export def STATUS_HTTP_VERSION_NOT_SUPPORTED: uint = 505;

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use bufio;
use encoding::utf8;
use errors;
use fmt;
use io;
use net::dial;
use net::uri;
use net;
use os;
use strconv;
use strings;
use types;
// Performs an HTTP [[request]] with the given [[client]]. The request is
// performed synchronously; this function blocks until the server has returned
// the response status and all HTTP headers associated with the response.
//
// If the provided [[response]] has a non-null body, the user must pass it to
// [[io::close]] before calling [[response_finish]].
export fn do(client: *client, req: *request) (response | error) = {
assert(req.target.scheme == "http"); // TODO: https
const conn = dial::dial_uri("tcp", req.target)?;
let buf: [os::BUFSZ]u8 = [0...];
let file = bufio::init(conn, [], buf);
bufio::setflush(&file, []);
fmt::fprintf(&file, "{} ", req.method)?;
// TODO: Support other request-targets than origin-form
const target = uri_origin_form(req.target);
uri::fmt(&file, &target)?;
fmt::fprintf(&file, " HTTP/1.1\r\n")?;
write_header(&file, &req.header)?;
fmt::fprintf(&file, "\r\n")?;
bufio::flush(&file)?;
const trans = match (req.transport) {
case let t: *transport =>
yield t;
case =>
yield &client.default_transport;
};
// TODO: Implement None
assert(trans.request_transport == transport_mode::AUTO);
assert(trans.response_transport == transport_mode::AUTO);
assert(trans.request_content == content_mode::AUTO);
assert(trans.response_content == content_mode::AUTO);
match (req.body) {
case let body: io::handle =>
io::copy(conn, body)?;
case void =>
yield;
};
let resp = response { ... };
const scan = bufio::newscanner(conn, 512);
read_statusline(&resp, &scan)?;
read_header(&resp.header, &scan)?;
const response_complete =
req.method == "HEAD" ||
resp.status == STATUS_NO_CONTENT ||
resp.status == STATUS_NOT_MODIFIED ||
(resp.status >= 100 && resp.status < 200) ||
(req.method == "CONNECT" && resp.status >= 200 && resp.status < 300);
if (!response_complete) {
resp.body = new_reader(conn, &resp, &scan)?;
} else if (req.method != "CONNECT") {
io::close(conn)!;
};
return resp;
};
fn read_statusline(
resp: *response,
scan: *bufio::scanner,
) (void | error) = {
const status = match (bufio::scan_string(scan, "\r\n")) {
case let line: const str =>
yield line;
case let err: io::error =>
return err;
case utf8::invalid =>
return protoerr;
case io::EOF =>
return protoerr;
};
const tok = strings::tokenize(status, " ");
const version = match (strings::next_token(&tok)) {
case let ver: str =>
yield ver;
case done =>
return protoerr;
};
const status = match (strings::next_token(&tok)) {
case let status: str =>
yield status;
case done =>
return protoerr;
};
const reason = match (strings::next_token(&tok)) {
case let reason: str =>
yield reason;
case done =>
return protoerr;
};
const (_, version) = strings::cut(version, "/");
const (major, minor) = strings::cut(version, ".");
const major = match (strconv::stou(major)) {
case let u: uint =>
yield u;
case =>
return protoerr;
};
const minor = match (strconv::stou(minor)) {
case let u: uint =>
yield u;
case =>
return protoerr;
};
resp.version = (major, minor);
if (resp.version.0 > 1) {
return errors::unsupported;
};
resp.status = match (strconv::stou(status)) {
case let u: uint =>
yield u;
case =>
return protoerr;
};
resp.reason = strings::dup(reason);
};

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use errors;
use io;
use net::dial;
// Errors possible while servicing HTTP requests. Note that these errors are for
// errors related to the processing of the HTTP connection; semantic HTTP errors
// such as [[STATUS_NOT_FOUND]] are not handled by this type.
export type error = !(dial::error | io::error | errors::unsupported | protoerr);
// An HTTP protocol error occurred, indicating that the remote party is not
// conformant with HTTP semantics.
export type protoerr = !void;
// Converts an [[error]] to a string.
export fn strerror(err: error) const str = {
match (err) {
case let err: dial::error =>
return dial::strerror(err);
case let err: io::error =>
return io::strerror(err);
case errors::unsupported =>
return "Unsupported HTTP feature";
case protoerr =>
return "HTTP protocol error";
};
};

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use bufio;
use encoding::utf8;
use fmt;
use io;
use strings;
// List of HTTP headers.
// TODO: [](str, []str)
export type header = [](str, str);
// Adds a given HTTP header, which may be added more than once. The name should
// be canonicalized by the caller.
export fn header_add(head: *header, name: str, val: str) void = {
assert(len(name) >= 1 && len(val) >= 1);
append(head, (strings::dup(name), strings::dup(val)));
};
// Sets the value of a given HTTP header, removing any previous values. The name
// should be canonicalized by the caller.
export fn header_set(head: *header, name: str, val: str) void = {
header_del(head, name);
header_add(head, name, val);
};
// Removes an HTTP header from a list of [[header]]. If multiple headers match
// the given name, all matching headers are removed.
export fn header_del(head: *header, name: str) void = {
for (let i = 0z; i < len(head); i += 1) {
if (head[i].0 == name) {
free(head[i].0);
free(head[i].1);
delete(head[i]);
i -= 1;
};
};
};
// Retrieves a value, or values, from a header. An empty string indicates the
// absence of a header.
export fn header_get(head: *header, name: str) str = {
for (let i = 0z; i < len(head); i += 1) {
const (key, val) = head[i];
if (key == name) {
return val;
};
};
return "";
};
// Frees state associated with an HTTP [[header]].
export fn header_free(head: *header) void = {
for (let i = 0z; i < len(head); i += 1) {
free(head[i].0);
free(head[i].1);
};
free(*head);
};
// Duplicates a set of HTTP headers.
export fn header_dup(head: *header) header = {
let new: header = [];
for (let i = 0z; i < len(head); i += 1) {
const (key, val) = head[i];
header_add(&new, key, val);
};
return new;
};
// Writes a list of HTTP headers to the provided I/O handle in the HTTP wire
// format.
export fn write_header(sink: io::handle, head: *header) (size | io::error) = {
let z = 0z;
for (let i = 0z; i < len(head); i += 1) {
const (name, val) = head[i];
z += fmt::fprintf(sink, "{}: {}\r\n", name, val)?;
};
return z;
};
fn read_header(head: *header, scan: *bufio::scanner) (void | io::error | protoerr) = {
for (true) {
const item = match (bufio::scan_string(scan, "\r\n")) {
case let line: const str =>
yield line;
case io::EOF =>
break;
case let err: io::error =>
return err;
case utf8::invalid =>
return protoerr;
};
if (item == "") {
break;
};
let (name, val) = strings::cut(item, ":");
val = strings::trim(val);
if (val == "") {
return protoerr;
};
// TODO: validate field-name
header_add(head, name, val);
};
};

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use errors;
use fmt;
use io;
use net::ip;
use net::uri;
use strconv;
use strings;
use bufio;
use memio;
use encoding::utf8;
use types;
// Stores state related to an HTTP request.
//
// For a request to be processable by an HTTP [[client]], i.e. via [[do]], the
// method and target must be filled in appropriately. The target must include at
// least a host, port, and scheme. The default values for other fields are
// suitable if appropriate for the request you wish to perform.
export type request = struct {
// HTTP request method, e.g. GET
method: str,
// Request target URI.
//
// Note that the normal constraints for [[uri::parse]] are not upheld in
// the case of a request using the origin-form (e.g. /index.html), i.e.
// the scheme field may be empty.
target: *uri::uri,
// List of HTTP request headers.
header: header,
// Transport configuration, or null to use the [[client]] default.
transport: nullable *transport,
// I/O reader for the request body, or void if there is no body.
body: (io::handle | void),
};
// Frees state associated with an HTTP [[request]].
export fn request_finish(req: *request) void = {
header_free(&req.header);
uri::finish(req.target);
free(req.target);
};
// Creates a new HTTP [[request]] using the given HTTP [[client]] defaults.
export fn new_request(
client: *client,
method: str,
target: *uri::uri,
) (request | errors::unsupported) = {
let req = request {
method = method,
target = alloc(uri::dup(target)),
header = header_dup(&client.default_header),
transport = null,
body = void,
};
switch (req.target.scheme) {
case "http" =>
if (req.target.port == 0) {
req.target.port = 80;
};
case "https" =>
if (req.target.port == 0) {
req.target.port = 443;
};
case =>
return errors::unsupported;
};
let host = match (req.target.host) {
case let host: str =>
yield host;
case let ip: ip::addr4 =>
yield ip::string(ip);
case let ip: ip::addr6 =>
static let buf: [64 + 2]u8 = [0...];
yield fmt::bsprintf(buf, "[{}]", ip::string(ip));
};
if (req.target.scheme == "http" && req.target.port != 80) {
host = fmt::asprintf("{}:{}", host, req.target.port);
} else if (target.scheme == "https" && target.port != 443) {
host = fmt::asprintf("{}:{}", host, req.target.port);
} else {
host = strings::dup(host);
};
defer free(host);
header_add(&req.header, "Host", host);
return req;
};
// Creates a new HTTP [[request]] using the given HTTP [[client]] defaults and
// the provided request body.
//
// If the provided I/O handle is seekable, the Content-Length header is added
// automatically. Otherwise, Transfer-Encoding: chunked will be used.
export fn new_request_body(
client: *client,
method: str,
target: *uri::uri,
body: io::handle,
) (request | errors::unsupported) = {
let req = new_request(client, method, target)?;
req.body = body;
const offs = match (io::seek(body, 0, io::whence::CUR)) {
case let off: io::off =>
yield off;
case io::error =>
header_add(&req.header, "Transfer-Encoding", "chunked");
return req;
};
const ln = io::seek(body, 0, io::whence::END)!;
io::seek(body, offs, io::whence::SET)!;
header_add(&req.header, "Content-Length", strconv::ztos(ln: size));
return req;
};
export type request_server = void;
export type authority = void;
export type request_uri = (
request_server |
authority |
*uri::uri |
str |
);
export type request_line = struct {
method: str,
uri: request_uri,
version: version,
};
export fn request_parse(file: io::handle) (request | protoerr | io::error) = {
const scan = bufio::newscanner(file, types::SIZE_MAX);
defer bufio::finish(&scan);
const req_line = request_line_parse(&scan)?;
defer request_line_finish(&req_line);
let header: header = [];
read_header(&header, &scan)?;
const target = match (req_line.uri) {
case let uri: request_server => return errors::unsupported;
case let uri: authority => return errors::unsupported;
case let uri: *uri::uri => yield uri;
case let path: str =>
const host = header_get(&header, "Host");
const uri = fmt::asprintf("http://{}{}", host, path);
defer free(uri);
yield alloc(uri::parse(uri)!);