Module: CurlImpersonate

Defined in:
lib/curl_impersonate.rb,
lib/curl_impersonate.rb,
lib/curl_impersonate/cookies.rb,
lib/curl_impersonate/version.rb,
lib/curl_impersonate/response.rb,
ext/curl_impersonate/curl_impersonate.c

Defined Under Namespace

Classes: Error, Response

Constant Summary collapse

DEFAULT_IMPERSONATE = 
"chrome131".freeze
DEFAULT_TIMEOUT_SEC = 
15
VERSION = 
"0.1.1"

Class Method Summary collapse

Class Method Details

._do_request_native(*args) ⇒ Object

Signature (stage 7):

_do_request_native(url, impersonate, headers, post_data,
                   follow_redirects, timeout_sec,
                   proxy_url, proxy_userpwd) -> Response

url               : String
impersonate       : String (e.g. "chrome131")
headers           : Hash<String, String>
post_data         : String — empty string means GET, non-empty means POST
follow_redirects  : true / false
timeout_sec       : Integer
proxy_url         : String — empty string disables; otherwise host (no auth)
proxy_userpwd     : String — "user:pass" or empty



115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
 
# File 'ext/curl_impersonate/curl_impersonate.c', line 115

static VALUE rb_cci_do_request(int argc, VALUE *argv, VALUE self) {
  (void)self;
  if (argc != 8) {
    rb_raise(rb_eArgError, "wrong number of arguments (given %d, expected 8)", argc);
  }

  VALUE rb_url = argv[0];
  VALUE rb_impersonate = argv[1];
  VALUE rb_headers = argv[2];
  VALUE rb_post_data = argv[3];
  VALUE rb_follow = argv[4];
  VALUE rb_timeout = argv[5];
  VALUE rb_proxy_url = argv[6];
  VALUE rb_proxy_userpwd = argv[7];

  Check_Type(rb_url, T_STRING);
  Check_Type(rb_impersonate, T_STRING);
  Check_Type(rb_headers, T_HASH);
  Check_Type(rb_post_data, T_STRING);
  Check_Type(rb_proxy_url, T_STRING);
  Check_Type(rb_proxy_userpwd, T_STRING);

  const char *url = StringValueCStr(rb_url);
  const char *impersonate = StringValueCStr(rb_impersonate);
  long timeout_sec = NUM2LONG(rb_timeout);
  long follow = RTEST(rb_follow) ? 1L : 0L;

  CURL *handle = curl_easy_init();
  if (!handle) {
    rb_raise(eError, "curl_easy_init failed");
  }

  CURLcode rc = curl_easy_impersonate(handle, impersonate, 1);
  if (rc != CURLE_OK) {
    curl_easy_cleanup(handle);
    rb_raise(eError, "curl_easy_impersonate(%s) failed: %s",
             impersonate, curl_easy_strerror(rc));
  }

  struct buffer body, headers_buf;
  buffer_init(&body);
  buffer_init(&headers_buf);

  curl_easy_setopt(handle, CURLOPT_URL, url);
  curl_easy_setopt(handle, CURLOPT_TIMEOUT, timeout_sec);
  curl_easy_setopt(handle, CURLOPT_FOLLOWLOCATION, follow);
  curl_easy_setopt(handle, CURLOPT_SSL_VERIFYPEER, 0L);
  curl_easy_setopt(handle, CURLOPT_SSL_VERIFYHOST, 0L);
  /* Empty string enables all built-in encodings (gzip, br, zstd if available) —
   * essential for matching browser Accept-Encoding fingerprint. */
  curl_easy_setopt(handle, CURLOPT_ACCEPT_ENCODING, "");
  curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, write_body_cb);
  curl_easy_setopt(handle, CURLOPT_WRITEDATA, &body);
  curl_easy_setopt(handle, CURLOPT_HEADERFUNCTION, write_header_cb);
  curl_easy_setopt(handle, CURLOPT_HEADERDATA, &headers_buf);

  /* POST body. We use COPYPOSTFIELDS so libcurl owns the copy and we can
   * release the Ruby String after setopt returns. POSTFIELDSIZE is set
   * explicitly so binary bodies with embedded NULs work. */
  long post_len = RSTRING_LEN(rb_post_data);
  if (post_len > 0) {
    curl_easy_setopt(handle, CURLOPT_POSTFIELDSIZE, post_len);
    curl_easy_setopt(handle, CURLOPT_COPYPOSTFIELDS, RSTRING_PTR(rb_post_data));
  }

  if (RSTRING_LEN(rb_proxy_url) > 0) {
    curl_easy_setopt(handle, CURLOPT_PROXY, StringValueCStr(rb_proxy_url));
  }
  if (RSTRING_LEN(rb_proxy_userpwd) > 0) {
    curl_easy_setopt(handle, CURLOPT_PROXYUSERPWD, StringValueCStr(rb_proxy_userpwd));
  }

  /* Custom headers. Build a curl_slist from the Ruby Hash. */
  struct slist_build sb = { .list = NULL, .error = 0 };
  if (RHASH_SIZE(rb_headers) > 0) {
    rb_hash_foreach(rb_headers, build_header_slist, (VALUE)&sb);
    if (sb.error) {
      curl_slist_free_all(sb.list);
      buffer_free(&body);
      buffer_free(&headers_buf);
      curl_easy_cleanup(handle);
      rb_raise(eError, "failed to build header list (non-string key/value or OOM)");
    }
    curl_easy_setopt(handle, CURLOPT_HTTPHEADER, sb.list);
  }

  struct perform_args args = { .handle = handle, .result = CURLE_OK };
  rb_thread_call_without_gvl(perform_without_gvl, &args, RUBY_UBF_IO, NULL);

  if (args.result != CURLE_OK) {
    char errbuf[256];
    strncpy(errbuf, curl_easy_strerror(args.result), sizeof(errbuf) - 1);
    errbuf[sizeof(errbuf) - 1] = '\0';
    curl_slist_free_all(sb.list);
    buffer_free(&body);
    buffer_free(&headers_buf);
    curl_easy_cleanup(handle);
    rb_raise(eError, "curl_easy_perform failed: %s", errbuf);
  }

  long status_code = 0;
  curl_easy_getinfo(handle, CURLINFO_RESPONSE_CODE, &status_code);

  VALUE rb_body    = rb_str_new(body.data ? body.data : "", body.len);
  VALUE rb_hdr_str = rb_str_new(headers_buf.data ? headers_buf.data : "", headers_buf.len);

  curl_slist_free_all(sb.list);
  buffer_free(&body);
  buffer_free(&headers_buf);
  curl_easy_cleanup(handle);

  return rb_struct_new(cResponse, LONG2NUM(status_code), rb_body, rb_hdr_str);
}

._native_curl_version ⇒ Object 



96
97
98
99
 
# File 'ext/curl_impersonate/curl_impersonate.c', line 96

static VALUE rb_cci_native_version(VALUE self) {
  (void)self;
  return rb_str_new_cstr(curl_version());
}

.do_request(url:, impersonate: DEFAULT_IMPERSONATE, headers: {}, post_data: "", follow_redirects: true, timeout_sec: DEFAULT_TIMEOUT_SEC, proxy: "") ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/curl_impersonate.rb', line 18

def self.do_request(url:,
                    impersonate: DEFAULT_IMPERSONATE,
                    headers: {},
                    post_data: "",
                    follow_redirects: true,
                    timeout_sec: DEFAULT_TIMEOUT_SEC,
                    proxy: "")
  string_headers = headers.each_with_object({}) { |(k, v), h| h[k.to_s] = v.to_s }
  proxy_url, proxy_userpwd = parse_proxy(proxy.to_s)
  _do_request_native(
    url.to_s,
    impersonate.to_s,
    string_headers,
    post_data.to_s,
    follow_redirects ? true : false,
    Integer(timeout_sec),
    proxy_url,
    proxy_userpwd,
  )
end

.extract_cookies(headers_str) ⇒ Object

Extracts cookies from a raw HTTP header string (the value of Response#headers). Returns a Hash<String, String>; later Set-Cookie lines with the same name overwrite earlier ones (matches the Go reference implementation).

Only the cookie name/value pair is kept — attributes such as Path, Domain, Expires, Secure are discarded.



8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
# File 'lib/curl_impersonate/cookies.rb', line 8

def self.extract_cookies(headers_str)
  cookies = {}
  return cookies if headers_str.nil? || headers_str.empty?

  headers_str.split(/\r?\n/).each do |line|
    next unless line.downcase.start_with?("set-cookie:")
    pair = line[("set-cookie:".length)..].split(";", 2).first.to_s.strip
    next if pair.empty?
    name, value = pair.split("=", 2)
    cookies[name] = value.to_s if name && !name.empty?
  end

  cookies
end

.parse_proxy(proxy) ⇒ Object

Split “scheme://user:pass@host:port” into (“scheme://host:port”, “user:pass”). Returns (“”, “”) for empty input. If there is no “@” the whole string is treated as the proxy URL with empty auth. Port-only or scheme-less inputs are passed through to libcurl, which has its own defaulting logic.



43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/curl_impersonate.rb', line 43

def self.parse_proxy(proxy)
  return ["", ""] if proxy.nil? || proxy.empty?

  scheme = ""
  rest = proxy
  if (idx = proxy.index("://"))
    scheme = proxy[0..(idx + 2)]
    rest = proxy[(idx + 3)..]
  end

  if (idx = rest.rindex("@"))
    auth = rest[0...idx]
    host = rest[(idx + 1)..]
    [scheme + host, auth]
  else
    [proxy, ""]
  end
end