forked from Telodendria/Telodendria
Jordan Bancino
461357b526
This makes it easier to build Cytoplasm as a component of another program (for example, Telodendria), or as a standalone system library.
211 lines
6.7 KiB
C
211 lines
6.7 KiB
C
/*
|
|
* Copyright (C) 2022-2024 Jordan Bancino <@jordan:bancino.net>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation files
|
|
* (the "Software"), to deal in the Software without restriction,
|
|
* including without limitation the rights to use, copy, modify, merge,
|
|
* publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#ifndef CYTOPLASM_HTTP_H
|
|
#define CYTOPLASM_HTTP_H
|
|
|
|
/***
|
|
* @Nm Http
|
|
* @Nd Encode and decode various parts of the HTTP protocol.
|
|
* @Dd March 12 2023
|
|
* @Xr HttpClient HttpServer HashMap Queue Memory
|
|
*
|
|
* .Nm
|
|
* is a collection of utility functions and type definitions that are
|
|
* useful for dealing with HTTP. HTTP is not a complex protocol, but
|
|
* this API makes it a lot easier to work with.
|
|
* .Pp
|
|
* Note that this API doesn't target any particular HTTP version, but
|
|
* it is currently used with HTTP 1.0 clients and servers, and
|
|
* therefore may be lacking functionality added in later HTTP versions.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "HashMap.h"
|
|
#include "Stream.h"
|
|
|
|
#define HTTP_FLAG_NONE 0
|
|
#define HTTP_FLAG_TLS (1 << 0)
|
|
|
|
/**
|
|
* The request methods defined by the HTTP standard. These numeric
|
|
* constants should be preferred to strings when building HTTP APIs
|
|
* because they are more efficient.
|
|
*/
|
|
typedef enum HttpRequestMethod
|
|
{
|
|
HTTP_METHOD_UNKNOWN,
|
|
HTTP_GET,
|
|
HTTP_HEAD,
|
|
HTTP_POST,
|
|
HTTP_PUT,
|
|
HTTP_DELETE,
|
|
HTTP_CONNECT,
|
|
HTTP_OPTIONS,
|
|
HTTP_TRACE,
|
|
HTTP_PATCH
|
|
} HttpRequestMethod;
|
|
|
|
/**
|
|
* An enumeration that corresponds to the actual integer values of the
|
|
* valid HTTP response codes.
|
|
*/
|
|
typedef enum HttpStatus
|
|
{
|
|
HTTP_STATUS_UNKNOWN = 0,
|
|
|
|
/* Informational responses */
|
|
HTTP_CONTINUE = 100,
|
|
HTTP_SWITCHING_PROTOCOLS = 101,
|
|
HTTP_EARLY_HINTS = 103,
|
|
|
|
/* Successful responses */
|
|
HTTP_OK = 200,
|
|
HTTP_CREATED = 201,
|
|
HTTP_ACCEPTED = 202,
|
|
HTTP_NON_AUTHORITATIVE_INFORMATION = 203,
|
|
HTTP_NO_CONTENT = 204,
|
|
HTTP_RESET_CONTENT = 205,
|
|
HTTP_PARTIAL_CONTENT = 206,
|
|
|
|
/* Redirection messages */
|
|
HTTP_MULTIPLE_CHOICES = 300,
|
|
HTTP_MOVED_PERMANENTLY = 301,
|
|
HTTP_FOUND = 302,
|
|
HTTP_SEE_OTHER = 303,
|
|
HTTP_NOT_MODIFIED = 304,
|
|
HTTP_TEMPORARY_REDIRECT = 307,
|
|
HTTP_PERMANENT_REDIRECT = 308,
|
|
|
|
/* Client error messages */
|
|
HTTP_BAD_REQUEST = 400,
|
|
HTTP_UNAUTHORIZED = 401,
|
|
HTTP_FORBIDDEN = 403,
|
|
HTTP_NOT_FOUND = 404,
|
|
HTTP_METHOD_NOT_ALLOWED = 405,
|
|
HTTP_NOT_ACCEPTABLE = 406,
|
|
HTTP_PROXY_AUTH_REQUIRED = 407,
|
|
HTTP_REQUEST_TIMEOUT = 408,
|
|
HTTP_CONFLICT = 409,
|
|
HTTP_GONE = 410,
|
|
HTTP_LENGTH_REQUIRED = 411,
|
|
HTTP_PRECONDITION_FAILED = 412,
|
|
HTTP_PAYLOAD_TOO_LARGE = 413,
|
|
HTTP_URI_TOO_LONG = 414,
|
|
HTTP_UNSUPPORTED_MEDIA_TYPE = 415,
|
|
HTTP_RANGE_NOT_SATISFIABLE = 416,
|
|
HTTP_EXPECTATION_FAILED = 417,
|
|
HTTP_TEAPOT = 418,
|
|
HTTP_UPGRADE_REQUIRED = 426,
|
|
HTTP_PRECONDITION_REQUIRED = 428,
|
|
HTTP_TOO_MANY_REQUESTS = 429,
|
|
HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
|
|
HTTP_UNAVAILABLE_FOR_LEGAL_REASONS = 451,
|
|
|
|
/* Server error responses */
|
|
HTTP_INTERNAL_SERVER_ERROR = 500,
|
|
HTTP_NOT_IMPLEMENTED = 501,
|
|
HTTP_BAD_GATEWAY = 502,
|
|
HTTP_SERVICE_UNAVAILABLE = 503,
|
|
HTTP_GATEWAY_TIMEOUT = 504,
|
|
HTTP_VERSION_NOT_SUPPORTED = 505,
|
|
HTTP_VARIANT_ALSO_NEGOTIATES = 506,
|
|
HTTP_NOT_EXTENDED = 510,
|
|
HTTP_NETWORK_AUTH_REQUIRED = 511
|
|
} HttpStatus;
|
|
|
|
/**
|
|
* Convert an HTTP status enumeration value into a string description
|
|
* of the status, which is to be used in server response to a client,
|
|
* or a client response to a user. For example, calling
|
|
* .Fn HttpStatusToString "HTTP_GATEWAY_TIMEOUT"
|
|
* (or
|
|
* .Fn HttpStatusToString "504" )
|
|
* produces the string "Gateway Timeout". Note that the returned
|
|
* pointers point to static space, so their manipulation is forbidden.
|
|
*/
|
|
extern const char * HttpStatusToString(const HttpStatus);
|
|
|
|
/**
|
|
* Convert a string into a numeric code that can be used throughout
|
|
* the code of a program in an efficient manner. See the definition
|
|
* of HttpRequestMethod. This function does case-sensitive matching,
|
|
* and does not trim or otherwise process the input string.
|
|
*/
|
|
extern HttpRequestMethod HttpRequestMethodFromString(const char *);
|
|
|
|
/**
|
|
* Convert a numeric code as defined by HttpRequestMethod into a
|
|
* string that can be sent to a server. Note that the returned pointers
|
|
* point to static space, so their manipulation is forbidden.
|
|
*/
|
|
extern const char * HttpRequestMethodToString(const HttpRequestMethod);
|
|
|
|
/**
|
|
* Encode a C string such that it can safely appear in a URL by
|
|
* performing the necessary percent escaping. A new string on the
|
|
* heap is returned. It should be freed with
|
|
* .Fn Free ,
|
|
* defined in the
|
|
* .Xr Memory 3
|
|
* API.
|
|
*/
|
|
extern char * HttpUrlEncode(char *);
|
|
|
|
/**
|
|
* Decode a percent-encoded string into a C string, ignoring encoded
|
|
* null characters entirely, because those would do nothing but cause
|
|
* problems.
|
|
*/
|
|
extern char * HttpUrlDecode(char *);
|
|
|
|
/**
|
|
* Decode an encoded parameter string in the form of
|
|
* ``key=val&key2=val2'' into a hash map whose values are C strings.
|
|
* This function properly decodes keys and values using the functions
|
|
* defined above.
|
|
*/
|
|
extern HashMap * HttpParamDecode(char *);
|
|
|
|
/**
|
|
* Encode a hash map whose values are strings as an HTTP parameter
|
|
* string suitable for GET or POST requests.
|
|
*/
|
|
extern char * HttpParamEncode(HashMap *);
|
|
|
|
/**
|
|
* Read HTTP headers from a stream and return a hash map whose values
|
|
* are strings. All keys are lowercased to make querying them
|
|
* consistent and not dependent on the case that was read from the
|
|
* stream. This is useful for both client and server code, since the
|
|
* headers are in the same format. This function should be used after
|
|
* parsing the HTTP status line, because it does not parse that line.
|
|
* It will stop when it encounters the first blank line, which
|
|
* indicates that the body is beginning. After this function completes,
|
|
* the body may be immediately read from the stream without any
|
|
* additional processing.
|
|
*/
|
|
extern HashMap * HttpParseHeaders(Stream *);
|
|
|
|
#endif
|