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106 lines
2.5 KiB
106 lines
2.5 KiB
#pragma once
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#include <string.h>
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#include "http_total.h"
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#include "panic.h"
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#define HTTP_MAX_HEADER_COUNT 16
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#define HTTP_MAX_HEADER_LENGTH 32
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#define HTTP_MAX_HEADER_VALUE_LENGTH 64
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#define HTTP_RESPONSE_400_BAD_REQUEST \
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"HTTP/1.1 400 Bad Request\r\n" \
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"Server: SLEdge\r\n" \
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"Connection: close\r\n" \
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"\r\n"
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#define HTTP_RESPONSE_413_PAYLOAD_TOO_LARGE \
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"HTTP/1.1 413 Payload Too Large\r\n" \
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"Server: SLEdge\r\n" \
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"Connection: close\r\n" \
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"\r\n"
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#define HTTP_RESPONSE_503_SERVICE_UNAVAILABLE \
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"HTTP/1.1 503 Service Unavailable\r\n" \
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"Server: SLEdge\r\n" \
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"Connection: close\r\n" \
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"\r\n"
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#define HTTP_RESPONSE_200_TEMPLATE \
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"HTTP/1.1 200 OK\r\n" \
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"Server: SLEdge\r\n" \
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"Connection: close\r\n" \
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"Content-Type: %s\r\n" \
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"Content-Length: %lu\r\n" \
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"\r\n"
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/* The sum of format specifier characters in the template above */
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#define HTTP_RESPONSE_200_TEMPLATE_FORMAT_SPECIFIER_LENGTH 5
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/**
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* Calculates the number of bytes of the HTTP response containing the passed header values
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* @return total size in bytes
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*/
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static inline size_t
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http_response_200_size(const char *content_type, ssize_t content_length)
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{
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size_t size = 0;
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size += strlen(HTTP_RESPONSE_200_TEMPLATE) - HTTP_RESPONSE_200_TEMPLATE_FORMAT_SPECIFIER_LENGTH;
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size += strlen(content_type);
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while (content_length > 0) {
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content_length /= 10;
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size++;
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}
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return size;
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}
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static inline int
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http_header_200_build(char *buffer, const char *content_type, ssize_t content_length)
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{
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return sprintf(buffer, HTTP_RESPONSE_200_TEMPLATE, content_type, content_length);
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}
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static inline const char *
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http_header_build(int status_code)
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{
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const char *response;
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int rc;
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switch (status_code) {
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case 503:
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response = HTTP_RESPONSE_503_SERVICE_UNAVAILABLE;
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http_total_increment_5XX();
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break;
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case 413:
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response = HTTP_RESPONSE_413_PAYLOAD_TOO_LARGE;
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http_total_increment_4XX();
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break;
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case 400:
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response = HTTP_RESPONSE_400_BAD_REQUEST;
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http_total_increment_4XX();
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break;
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default:
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panic("%d is not a valid status code\n", status_code);
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}
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return response;
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}
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static inline int
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http_header_len(int status_code)
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{
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switch (status_code) {
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case 503:
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return strlen(HTTP_RESPONSE_503_SERVICE_UNAVAILABLE);
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case 413:
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return strlen(HTTP_RESPONSE_413_PAYLOAD_TOO_LARGE);
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case 400:
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return strlen(HTTP_RESPONSE_400_BAD_REQUEST);
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default:
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panic("%d is not a valid status code\n", status_code);
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}
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}
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