Requests

Requests is a simple HTTP library for mql4, built for human beings. Requests lib allows you to send HTTP/1.1 requests easily.

Installing

Download repo and copy mql_requests/Include/requests.mqh folder to <TERMINAL DIR>/MQL(4/5)/Include

Simple usage

#include <requests/requests.mqh>

int OnInit(){
    ...
    
    Requests requests;
    Response response = requests.get("https://site.com/some/url?par=foo&par_2=bar");
    Print("Response: " + response.text);
    // Response: some_response_of_url

    Print("Response parameters: " + response.parameters);
    // Response query: par=foo&par_2=bar
}

You can send GET or POST requests:

response = requests.get("https://site.com/some/url?par=foo&par_2=bar");
response = requests.post("https://site.com/some/url", "par=foo&par_2=bar");

// or send() for dynamic define request query
string method = "POST";
response = requests.send(method, "https://site.com/some/url", "par=foo&par_2=bar");

Using requests.get(), you can use GET-parameter in url and data together. Next examples are equivalent:

response = requests.get("https://site.com/some/url?par=foo&par_2=bar");
response = requests.get("https://site.com/some/url", "par=foo&par_2=bar");
response = requests.get("https://site.com/some/url?par=foo", "par_2=bar");
Print("Response parameters: " + response.parameters);
// "Response parameters: par=foo&par_2=bar"

You can use array of string for request data:

string array_data[2][2];
array_data[0][0] = "par_1"; array_data[0][1] = "foo";
array_data[1][0] = "par_2"; array_data[1][1] = "bar";

response = requests.get(url, array_data);

Usage with RequestData

RequestData request_data;
request_data.add("par", "foo");

Requests requests;
Response response = requests.get("https://site.com/some/url", request_data);
Print("Response: " + response.text);
// Response: some_response_of_url

Print("Response parameters: " + response.parameters);
// Response parameters: par=foo

Features

• HTTP connection reuse
• Sending of GET or POST requests

Detailed information of using Requests

You can define DEBUG_REQUESTS for display more detailed information of usage Requests:

#include "lib/requests.mqh"

#define DEBUG_REQUESTS


int OnInit(){
    Requests requests;
    Response response = requests.get("https://site.com/some/url", "par=foo&par_2=bar");
    Print("Response: " + response.text);
}

With DEBUG_REQUESTS you will an addition information to journal Terminal/Experts.

API RequestData

RequestData is helper class for simple create request data.

USAGE:

RequestData request_data;
request_data.add("par_1", "foo");
request_data.add("par_2", "bar");

Requests requests;
Response response = requests.get(url, request_data);
Print("Response: " + response.text);

You can replace value of pair using the same name in request_data.add():

RequestData request_data;
request_data.add("par_1", "foo");
request_data.add("par_2", "bar");

Print(request_data.to_str());
// "par_1=foo&par_2=bar"

request_data.add("par_2", "super_bar");
Print(request_data.to_str());
// "par_1=foo&par_2=super_bar"

Use request_data.remove() for clear data and fill request_data new data:

RequestData request_data;
request_data.add("par_1", "foo");
request_data.add("par_2", "bar");
request_data.add("par_3", "baz");
Print(request_data.to_str());
// "par_1=foo&par_2=bar&par_3=baz"

request_data.remove("par_2");  // removes data pair with specific name
Print(request_data.to_str());
// "par_1=foo&par_3=baz"

request_data.remove();  // removes all data pairs
Print(request_data.to_str());
// ""

Use static method to_str(string& _data[][]) if you have an array of pairs:

string array_data[2][2];
array_data[0][0] = "par_1"; array_data[0][1] = "foo";
array_data[1][0] = "par_2"; array_data[1][1] = "bar";
Print(RequestData::to_str(array_data));
// "par_1=foo&par_2=bar&par_3=baz"

Run tests

1. Copy mql_requests/Experts/TestRequest.mq4 to <TERMINAL DIR>/MQL(4/5)/Experts
2. Download mql_unit_test and copy mql_unit_test/Include/unit_test.mqh folder to <TERMINAL DIR>/MQL(4/5)/Include
3. Compile TestRequest.mq4 and run TestRequest.ex4 in terminal in a window of any trading pair.
4. Look test result in <TERMINAL DIR>/Files/TestRequests_unit_test_log.txt

CONTRIBUTING

To reporting bugs or suggest improvements, please use the issue tracker.

Thank you very much, that you would like to contribute to mql_requests. Thanks to the present, past and future contributors.

If you think you have discovered a security issue in our code, please do not create issue or raise it in any public forum until we have had a chance to deal with it. For security issues use [email protected]

LINKS

• Project's home: https://github.com/vivazzi/mql_requests
• Report bugs and suggest improvements: https://github.com/vivazzi/mql_requests/issues
• Author's site, Artem Maltsev: https://vivazzi.pro

LICENCE

Copyright © 2022 Artem Maltsev and contributors.

MIT licensed.