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#include "common.h"
#include "util.h"
/**
* @brief calls recv into buffer until everything is read
*
*/
int64_t recv_full_buffer(int client_fd, char** _buffer, int* header_eof, int* state){
char* header, *buffer = malloc(BUFFER_SIZE * sizeof * buffer);
memset(buffer, 0, BUFFER_SIZE);
int64_t len = 0;
*header_eof = -1;
int n, content_len = -1;
//printf("&_\n");
for(;;){
n = recv(client_fd, buffer + len, BUFFER_SIZE, 0);
if(n < 0){
*_buffer = buffer;
printf("%s %i\n",strerror(errno),errno);
if(*header_eof == -1) return -2; //dont even try w/ request, no header to read
return -1; //well the header is fine atleast
};
if(*header_eof == -1 && (header = strstr(buffer, "\r\n\r\n")) != NULL){
*header_eof = header - buffer;
char* cont_len_raw = strstr(buffer, "Content-Length: ");
if(cont_len_raw == NULL) {
len += n;
*_buffer = buffer;
return len;
}
str* cont_len_str = str_init("");
if(cont_len_raw == NULL) abort();
//i is length of 'Content-Length: '
for(int i = 16; cont_len_raw[i] != '\r'; i++) str_pushl(cont_len_str, cont_len_raw + i, 1);
content_len = strtol(cont_len_str->c, NULL, 10);
str_free(cont_len_str);
if(content_len > max_content_length) {
*_buffer = buffer;
*state = (len + n != content_len + *header_eof + 4);
return len + n;
}
buffer = realloc(buffer, content_len + *header_eof + 4 + BUFFER_SIZE);
if(buffer == NULL) p_fatal("unable to allocate");
}
len += n;
if(len >= MAX_HEADER_SIZE){
*_buffer = buffer;
return -2;//p_fatal("too large");
}
if(*header_eof == -1){
buffer = realloc(buffer, len + BUFFER_SIZE + 1);
memset(buffer + len, 0, n + 1);
}
if(content_len != -1 && len - *header_eof - 4 >= content_len) break;
}
*_buffer = buffer;
return len;
}
/**
* @brief converts the request buffer into a parray_t
*
*/
int parse_header(char* buffer, int header_eof, parray_t** _table){
if(header_eof == -1) return -1;
char add[] = {0,0};
int lines = 3;
for(int i = 0; i != header_eof; i++) lines += buffer[i] == '\n';
parray_t* table = parray_init();
str* current = str_init("");
int oi = 0;
int item = 0;
for(; oi != header_eof; oi++){
if(buffer[oi] == ' ' || buffer[oi] == '\n'){
if(buffer[oi] == '\n') current->c[current->len - 1] = 0;
parray_set(table, item == 0 ? "Request" :
item == 1 ? "Path" : "Version", (void*)str_init(current->c));
str_clear(current);
item++;
if(buffer[oi] == '\n') break;
} else {
str_pushl(current, buffer + oi, 1);
}
}
if(item != 3){
*_table = table;
return -1;
}
int key = 1;
str* sw = NULL;
for(int i = oi + 1; i != header_eof; i++){
if(buffer[i] == ' ' && strcmp(current->c, "") == 0) continue;
if(key && buffer[i] == ':' || !key && buffer[i] == '\n'){
if(key){
sw = current;
current = str_init("");
key = 0;
} else {
if(buffer[oi] == '\n') current->c[current->len - 1] = 0;
parray_set(table, sw->c, (void*)str_init(current->c));
str_clear(current);
str_free(sw);
sw = NULL;
key = 1;
}
continue;
} else str_pushl(current, buffer + i, 1);
}
if(sw != NULL){
parray_set(table, sw->c, (void*)str_init(current->c));
str_free(sw);
}
str_free(current);
*_table = table;
return 0;
}
/**
* @brief contructs an http request
*
*/
void http_build(str** _dest, int code, char* code_det, char* header_vs, char* content, size_t len){
char* dest = malloc(HTTP_BUFFER_SIZE);
memset(dest, 0, HTTP_BUFFER_SIZE);
sprintf(dest,
"HTTP/1.1 %i %s\r\n"
"%s"
"\r\n"
, code, code_det, header_vs);
*_dest = str_init(dest);
str_pushl(*_dest, content, len);
free(dest);
}
/**
* @brief gets a string representation of a http code
*
*/
void http_code(int code, char* code_det){
switch(code){
case 100: sprintf(code_det,"Continue"); break;
case 101: sprintf(code_det,"Switching Protocols"); break;
case 102: sprintf(code_det,"Processing"); break;
case 103: sprintf(code_det,"Early Hints"); break;
case 200: sprintf(code_det,"OK"); break;
case 201: sprintf(code_det,"Created"); break;
case 202: sprintf(code_det,"Accepted"); break;
case 203: sprintf(code_det,"Non-Authoritative Information"); break;
case 204: sprintf(code_det,"No Content"); break;
case 205: sprintf(code_det,"Reset Content"); break;
case 206: sprintf(code_det,"Partial Content"); break;
case 207: sprintf(code_det,"Multi-Status"); break;
case 208: sprintf(code_det,"Already Reported"); break;
case 226: sprintf(code_det,"IM Used"); break;
case 300: sprintf(code_det,"Multiple Choices"); break;
case 301: sprintf(code_det,"Moved Permanently"); break;
case 302: sprintf(code_det,"Found"); break;
case 303: sprintf(code_det,"See Other"); break;
case 304: sprintf(code_det,"Not Modified"); break;
case 307: sprintf(code_det,"Temporary Redirect"); break;
case 308: sprintf(code_det,"Permanent Redirect"); break;
case 400: sprintf(code_det,"Bad Request"); break;
case 401: sprintf(code_det,"Unauthorized"); break;
case 402: sprintf(code_det,"Payment Required"); break;
case 403: sprintf(code_det,"Forbidden"); break;
case 404: sprintf(code_det,"Not Found"); break;
case 405: sprintf(code_det,"Method Not Allowed"); break;
case 406: sprintf(code_det,"Not Acceptable"); break;
case 407: sprintf(code_det,"Proxy Authentication Required"); break;
case 408: sprintf(code_det,"Request Timeout"); break;
case 409: sprintf(code_det,"Conflict"); break;
case 410: sprintf(code_det,"Gone"); break;
case 411: sprintf(code_det,"Length Required"); break;
case 412: sprintf(code_det,"Precondition Failed"); break;
case 413: sprintf(code_det,"Content Too Large"); break;
case 414: sprintf(code_det,"URI Too Long"); break;
case 415: sprintf(code_det,"Unsupported Media Type"); break;
case 416: sprintf(code_det,"Range Not Satisfiable"); break;
case 417: sprintf(code_det,"Expectation Failed"); break;
case 418: sprintf(code_det,"I'm a teapot"); break;
case 421: sprintf(code_det,"Misdirected Request"); break;
case 422: sprintf(code_det,"Unprocessable Content"); break;
case 423: sprintf(code_det,"Locked"); break;
case 424: sprintf(code_det,"Failed Dependency"); break;
case 425: sprintf(code_det,"Too Early"); break;
case 426: sprintf(code_det,"Upgrade Required"); break;
case 428: sprintf(code_det,"Precondition Required"); break;
case 429: sprintf(code_det,"Too Many Requests"); break;
case 431: sprintf(code_det,"Request Header Fields Too Large"); break;
case 451: sprintf(code_det,"Unavailable For Legal Reasons"); break;
case 500: sprintf(code_det,"Internal Server Error"); break;
case 501: sprintf(code_det,"Not Implemented"); break;
case 502: sprintf(code_det,"Bad Gateway"); break;
case 503: sprintf(code_det,"Service Unavailable"); break;
case 504: sprintf(code_det,"Gateway Timeout"); break;
case 505: sprintf(code_det,"HTTP Version Not Supported"); break;
case 506: sprintf(code_det,"Variant Also Negotiates"); break;
case 507: sprintf(code_det,"Insufficient Storage"); break;
case 508: sprintf(code_det,"Loop Detected"); break;
case 510: sprintf(code_det,"Not Extended"); break;
case 511: sprintf(code_det,"Network Authentication Required"); break;
default: sprintf(code_det,"unknown");
}
}
void client_fd_errors(int client_fd){
if(client_fd>=0) return;
switch(client_fd){
case -1:
p_fatal("client fd already closed\n");
case -2:
p_fatal("request was partial\n");
default:
p_fatal("unknown negative client_fd value");
}
}
int content_disposition(str* src, parray_t** _dest){
char* end = strnstr(src->c, ";", src->len);
parray_t* dest = parray_init();
if(end == NULL){
parray_set(dest, "form-data", (void*)str_init(src->c));
return 0;
}
str* temp = str_init("");
str_pushl(temp, src->c, end - src->c);
parray_set(dest, "form-data", (void*)temp);
int len = end - src->c;
char* buffer = end + 1;
gen_parse(buffer, src->len - len, &dest);
//printf("\n**\n");
//for(int i = 0; i != dest->len; i++){
// printf("'%s : %s'\n",((str*)dest->P[i].key)->c,((str*)dest->P[i].value)->c);
//}
*_dest = dest;
return 1;
}
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