1/* copyright (c) 2022 - 2025 grunfink et al. / MIT license */
  2
  3#ifndef _XS_HTTPD_H
  4
  5#define _XS_HTTPD_H
  6
  7xs_dict *xs_httpd_request(FILE *f, xs_str **payload, int *p_size);
  8void xs_httpd_response(FILE *f, int status, const char *status_text,
  9                        const xs_dict *headers, const xs_val *body, int b_size);
 10
 11
 12#ifdef XS_IMPLEMENTATION
 13
 14xs_dict *xs_httpd_request(FILE *f, xs_str **payload, int *p_size)
 15/* processes an httpd connection */
 16{
 17    xs *q_vars = NULL;
 18    xs *p_vars = NULL;
 19    xs *l1;
 20    const char *v;
 21    char *saveptr;
 22
 23    xs_socket_timeout(fileno(f), 2.0, 0.0);
 24
 25    /* read the first line and split it */
 26    l1 = xs_strip_i(xs_readline(f));
 27    char *raw_path;
 28    const char *mtd;
 29    const char *proto;
 30
 31    if (!(mtd = strtok_r(l1, " ", &saveptr)) ||
 32        !(raw_path = strtok_r(NULL, " ", &saveptr)) ||
 33        !(proto = strtok_r(NULL, " ", &saveptr)) ||
 34        strtok_r(NULL, " ", &saveptr))
 35        return NULL;
 36
 37    if (!xs_is_string(mtd) || !xs_is_string(raw_path) || !xs_is_string(proto))
 38        return NULL;
 39
 40    xs_dict *req = xs_dict_new();
 41
 42    req = xs_dict_append(req, "method", mtd);
 43    req = xs_dict_append(req, "raw_path", raw_path);
 44    req = xs_dict_append(req, "proto",  proto);
 45
 46    {
 47        char *q = strchr(raw_path, '?');
 48
 49        /* get the variables */
 50        if (q) {
 51                *q++ = '\0';
 52                q_vars = xs_url_vars(q);
 53        }
 54        /* store the path */
 55        req = xs_dict_append(req, "path", raw_path);
 56    }
 57
 58    /* read the headers */
 59    for (;;) {
 60        xs *l;
 61
 62        l = xs_strip_i(xs_readline(f));
 63
 64        /* done with the header? */
 65        if (strcmp(l, "") == 0)
 66            break;
 67
 68        /* split header and content */
 69        char *cnt = strchr(l, ':');
 70        if (!cnt)
 71            continue;
 72
 73        *cnt++ = '\0';
 74        cnt += strspn(cnt, " \r\n\t\v\f");
 75        l = xs_rstrip_chars_i(l, " \r\n\t\v\f");
 76
 77        if (!xs_is_string(cnt))
 78            continue;
 79
 80        req = xs_dict_append(req, xs_tolower_i(l), cnt);
 81    }
 82
 83    xs_socket_timeout(fileno(f), 5.0, 0.0);
 84
 85    if ((v = xs_dict_get(req, "content-length")) != NULL) {
 86        /* if it has a payload, load it */
 87        *p_size  = atoi(v);
 88        *payload = xs_read(f, p_size);
 89    }
 90
 91    v = xs_dict_get(req, "content-type");
 92
 93    if (*payload && v && strcmp(v, "application/x-www-form-urlencoded") == 0) {
 94        p_vars  = xs_url_vars(*payload);
 95    }
 96    else
 97    if (*payload && v && xs_startswith(v, "multipart/form-data")) {
 98        p_vars = xs_multipart_form_data(*payload, *p_size, v);
 99    }
100    else
101        p_vars = xs_dict_new();
102
103    req = xs_dict_append(req, "q_vars",  q_vars);
104    req = xs_dict_append(req, "p_vars",  p_vars);
105
106    if (errno)
107        req = xs_free(req);
108
109    return req;
110}
111
112
113void xs_httpd_response(FILE *f, int status, const char *status_text,
114                        const xs_dict *headers, const xs_val *body, int b_size)
115/* sends an httpd response */
116{
117    fprintf(f, "HTTP/1.1 %d %s\r\n", status, status_text ? status_text : "");
118
119    const xs_str *k;
120    const xs_val *v;
121
122    xs_dict_foreach(headers, k, v) {
123        fprintf(f, "%s: %s\r\n", k, v);
124    }
125
126    if (b_size != 0)
127        fprintf(f, "content-length: %d\r\n", b_size);
128
129    fprintf(f, "\r\n");
130
131    if (body != NULL && b_size != 0)
132        fwrite(body, b_size, 1, f);
133}
134
135
136#endif /* XS_IMPLEMENTATION */
137
138#endif /* XS_HTTPD_H */