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seregonwar
f19ac02d6f
The HTTP stack had grown into a single file that owned sockets, parsing, uploads and every API domain. Split it into focused modules (listener, response stream, upload, json helpers) with the domain handlers next to the APIs they serve, and cover framing, streaming and uploads with unit tests.
146 lines
5.9 KiB
C
146 lines
5.9 KiB
C
/*
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MIT License
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Copyright (c) 2026 Seregon
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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/**
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* @file http_response.h
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* @brief HTTP response builder
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*
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* STATUS CODES:
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* 2xx Success (200, 201, 204, 206)
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* 3xx Redirection (301, 304)
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* 4xx Client error (400, 403, 404, 405, 409, 415, 416)
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* 5xx Server error (500)
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*/
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#ifndef HTTP_RESPONSE_H
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#define HTTP_RESPONSE_H
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#include "http_config.h"
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#include "pal_limits.h"
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#include <stddef.h>
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#include <sys/types.h>
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/*===========================================================================*
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* HTTP STATUS CODES
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*===========================================================================*/
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typedef enum {
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/* 2xx ── Success */
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HTTP_STATUS_200_OK = 200,
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HTTP_STATUS_206_PARTIAL_CONTENT = 206,
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HTTP_STATUS_201_CREATED = 201,
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HTTP_STATUS_204_NO_CONTENT = 204,
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/* 3xx ── Redirection */
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HTTP_STATUS_301_MOVED = 301,
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HTTP_STATUS_304_NOT_MODIFIED = 304,
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/* 4xx ── Client Error */
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HTTP_STATUS_400_BAD_REQUEST = 400,
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HTTP_STATUS_403_FORBIDDEN = 403,
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HTTP_STATUS_404_NOT_FOUND = 404,
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HTTP_STATUS_405_METHOD_NOT_ALLOWED = 405,
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HTTP_STATUS_409_CONFLICT = 409,
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HTTP_STATUS_415_UNSUPPORTED_MEDIA_TYPE = 415,
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HTTP_STATUS_416_RANGE_NOT_SATISFIABLE = 416,
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/* 5xx ── Server Error */
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HTTP_STATUS_500_INTERNAL_ERROR = 500,
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} http_status_t;
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/*===========================================================================*
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* RESPONSE BUFFER
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*===========================================================================*/
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typedef struct {
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char data[HTTP_RESPONSE_BUFFER_SIZE];
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size_t used;
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/* In-memory body streaming (for large embedded static assets) */
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const void *mem_body; /**< Pointer to body bytes (NULL = not used) */
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size_t mem_length; /**< Total bytes to send */
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size_t mem_sent; /**< Bytes already sent */
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int mem_body_owned; /**< 1 = malloc'd, destroy() must free it */
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/* In-memory segmented body streaming (for injected HTML) */
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const void *mem_segs[3]; /**< Segment pointers */
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size_t mem_lens[3]; /**< Segment lengths */
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size_t mem_seg_count; /**< 0 = disabled, otherwise 1..3 */
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size_t mem_seg_index; /**< Current segment index */
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size_t mem_seg_sent; /**< Bytes sent in current segment */
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char mem_inline[160]; /**< Inline storage for small injected data */
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/* sendfile() support for zero-copy file downloads */
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int sendfile_fd; /**< File fd (-1 = not used) */
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off_t sendfile_offset; /**< Current offset in file */
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size_t sendfile_count; /**< Remaining bytes to send */
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/* Chunked directory streaming (for /api/list) */
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void *stream_dir; /**< DIR* — NULL = not streaming */
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char stream_path[PAL_PATH_MAX]; /**< Canonical directory path */
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/*
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* Producer-driven chunked body, used when the bytes are not simply the file
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* content (SELF decryption through the VFS). stream_read returns 0 at EOF,
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* a negative value on error; stream_close releases the context and is called
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* by http_response_destroy() even when the transfer was cut short.
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*/
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void *stream_ctx;
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ssize_t (*stream_read)(void *ctx, void *buf, size_t len);
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/* Called once with 0 after the entire body was sent, or -1 if the
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* connection/producer failed or the response was discarded. */
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void (*stream_result)(void *ctx, int result);
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void (*stream_close)(void *ctx);
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/**
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* 1 = frame the produced bytes with chunked encoding (no known length),
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* 0 = send them raw, which requires a Content-Length header. Console
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* browsers download reliably only in the second case.
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*/
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int stream_chunked;
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} http_response_t;
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/*===========================================================================*
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* PUBLIC API
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*===========================================================================*/
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http_response_t *http_response_create(http_status_t status);
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int http_response_add_header(http_response_t *resp, const char *name,
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const char *value);
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int http_response_set_body(http_response_t *resp, const void *body,
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size_t length);
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int http_response_set_body_owned(http_response_t *resp, void *body,
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size_t length);
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int http_response_set_body_ref(http_response_t *resp, const void *body,
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size_t length);
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int http_response_set_body_splice(http_response_t *resp, const void *prefix,
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size_t prefix_len, const void *insert,
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size_t insert_len, const void *suffix,
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size_t suffix_len);
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int http_response_append_raw(http_response_t *resp, const void *data,
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size_t length);
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int http_response_finalize(http_response_t *resp);
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void http_response_destroy(http_response_t *resp);
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#endif /* HTTP_RESPONSE_H */
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