Zander671/cse-130-http-server
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Mostly get stuff done

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This commit is contained in:
Alexander Rosenberg
2026-05-26 20:33:31 -07:00
parent 1e81a75a8a
commit 656b3ade80
1 changed files with 58 additions and 58 deletions
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http.c
+33 -33
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@@ -5,11 +5,10 @@
#include <string.h>
#include <unistd.h>
static const char* EMPTY_STRING = "";
static const char *EMPTY_STRING = "";
HTTPHeaderList* http_header_list_push(HTTPHeaderList* list, const char* key, const char* value)
{
HTTPHeaderList* new = malloc(sizeof(HTTPHeaderList));
HTTPHeaderList *http_header_list_push(HTTPHeaderList *list, const char *key, const char *value) {
HTTPHeaderList *new = malloc(sizeof(HTTPHeaderList));
if (!new) {
return NULL;
}
@@ -32,10 +31,9 @@ HTTPHeaderList* http_header_list_push(HTTPHeaderList* list, const char* key, con
return new;
}
void free_http_header_list(HTTPHeaderList* list)
{
void free_http_header_list(HTTPHeaderList *list) {
while (list) {
HTTPHeaderList* next = list->next;
HTTPHeaderList *next = list->next;
free(list->key);
free(list->value);
free(list);
@@ -43,8 +41,7 @@ void free_http_header_list(HTTPHeaderList* list)
}
}
const char* http_header_list_search(HTTPHeaderList* list, const char* key, const char* def)
{
const char *http_header_list_search(HTTPHeaderList *list, const char *key, const char *def) {
while (list) {
if (strcmp(list->key, key) == 0) {
return list->value;
@@ -68,19 +65,18 @@ const char* http_header_list_search(HTTPHeaderList* list, const char* key, const
// if an error occured, req->uri is not allocated
static HTTPRequestParseResult parse_method_uri_line(
FILE* stream, size_t* restrict bytes_read, HTTPRequest* restrict req)
{
FILE *stream, size_t *restrict bytes_read, HTTPRequest *restrict req) {
// allow for some leeway in passing incorrect methods
char method[MAX_METHOD_LENGTH + 1];
char uri[MAX_URI_LENGTH + 1];
char version_str[MAX_VERSION_LENGTH + 1];
char whitespace[4];
char whitespace[4] = { 0, 0, 0, 0 };
ssize_t signed_bytes_read;
#define S1(s) #s
#define S(s) S1(s)
int nconv = fscanf(stream,
// clang-format off
"%" S(MAX_METHOD_LENGTH) "[A-Z]"
"%" S(MAX_METHOD_LENGTH) "[A-Z0-9]"
"%c"
"%" S(MAX_URI_LENGTH) "[^ \n\r]"
"%c"
@@ -93,13 +89,12 @@ static HTTPRequestParseResult parse_method_uri_line(
#undef S
*bytes_read = signed_bytes_read;
RETURN_IF_READ_ERROR(stream);
if (nconv != 7 || memcmp(whitespace, " \r\n", 4) != 0) {
return HRPR_BAD_FORMAT;
}
if (nconv >= 1 && (nconv == 1 || whitespace[0] == ' ')) {
req->method = strdup(method);
if (!req->method) {
return HRPR_NO_MEM;
}
if (nconv >= 3 && (nconv == 3 || whitespace[1] == ' ')) {
req->uri = strdup(uri);
if (!req->uri) {
return HRPR_NO_MEM;
@@ -108,14 +103,18 @@ static HTTPRequestParseResult parse_method_uri_line(
while (*req->path == '/') {
++req->path;
}
}
}
if (nconv != 7 || *uri != '/' || memcmp(whitespace, " \r\n", 4) != 0) {
return HRPR_BAD_FORMAT;
}
return strcmp(version_str, "1.1") == 0 ? HRPR_OK : HRPR_BAD_VERSION;
}
// return true if there are more headers and no error occurred, false otherwise
// this will *not* free LIST if an error occurs
static bool next_header(FILE* stream, size_t* restrict bytes_read,
HTTPRequestParseResult* restrict res, HTTPHeaderList* restrict* restrict list)
{
static bool next_header(FILE *stream, size_t *restrict bytes_read,
HTTPRequestParseResult *restrict res, HTTPHeaderList *restrict *restrict list) {
char c = fgetc(stream);
RETURN_IF_READ_ERROR(stream);
if (c == '\r') {
@@ -128,6 +127,9 @@ static bool next_header(FILE* stream, size_t* restrict bytes_read,
*bytes_read = 2;
*res = HRPR_OK;
return false;
} else if (feof(stream)) {
*res = HRPR_BAD_FORMAT;
return false;
}
ungetc(c, stream);
char key[MAX_HEADER_KEY_LENGTH + 1];
@@ -159,8 +161,7 @@ static bool next_header(FILE* stream, size_t* restrict bytes_read,
return true;
}
HTTPRequestParseResult parse_http_request(FILE* stream, HTTPRequest* restrict out)
{
HTTPRequestParseResult parse_http_request(FILE *stream, HTTPRequest *restrict out) {
out->uri = EMPTY_STRING;
out->path = EMPTY_STRING;
out->method = EMPTY_STRING;
@@ -180,26 +181,26 @@ HTTPRequestParseResult parse_http_request(FILE* stream, HTTPRequest* restrict ou
return res;
}
void free_http_request(HTTPRequest* restrict req)
{
void free_http_request(HTTPRequest *restrict req) {
if (req->method != EMPTY_STRING) {
free((char*)req->method);
free((char *) req->method);
}
if (req->uri != EMPTY_STRING) {
free((char*)req->uri);
free((char *) req->uri);
}
free_http_header_list(req->headers);
}
const char* status_code_to_message(int status, size_t* restrict length)
{
const char *status_code_to_message(int status, size_t *restrict length) {
static const struct {
int code;
const char* msg;
const char *msg;
size_t size;
} CODES[] = {
#define P(s, m) \
{ s, m, sizeof(m) - 1 }
// can't get my local copy of clang-format (v18) to work with the autograder
// clang-format off
#define P(s, m) { s, m, sizeof(m) - 1 }
// clang-format on
P(200, "OK"),
P(201, "Created"),
P(400, "Bad Request"),
@@ -222,13 +223,12 @@ const char* status_code_to_message(int status, size_t* restrict length)
return NULL;
}
void format_http_response(FILE* stream, HTTPResponse* restrict resp)
{
void format_http_response(FILE *stream, HTTPResponse *restrict resp) {
assert(status_code_to_message(resp->status, NULL));
dprintf(fileno(stream), "HTTP/1.1 %d %s\r\n", resp->status,
status_code_to_message(resp->status, NULL));
dprintf(fileno(stream), "Content-Length: %zu\r\n", resp->body_length);
for (HTTPHeaderList* h = resp->headers; h; h = h->next) {
for (HTTPHeaderList *h = resp->headers; h; h = h->next) {
write(fileno(stream), h->key, h->key_length);
write(fileno(stream), ": ", 2);
write(fileno(stream), h->value, h->value_length);