The functions for network/internet operations are described here.

• ​Download( str url, str filename ) int​

• ​HeadInfo( str url ) hinfo​

• ​HTTPGet( str url ) buf​

• ​HTTPPage( str url ) str​

• ​HTTPRequest( str url, str method, map.str params, map.str headers ) str​

Types

hinfo

The hinfo type is used to get url address information and has the following fields:

• int Status - response status.

• int Length - content size. It may not be specified (equal to 0).

• str Type - content type. For example, text/html; charset=UTF-8.

HTTP functions

Download( str url, str filename ) int

The Download function downloads the file from the specified URL and saves it with the specified filename. The function returns the size of the downloaded file.

    str ftemp = TempDir() + `/readme.html`
    int size = Download("https://github.com/gentee/gentee", ftemp)

HeadInfo(str url) hinfo

The HeadInfo function sends a HEAD request to the specified url and returns the hinfo structure.

HTTPGet( str url ) buf

The HTTPGet function sends a GET request to the specified URL and returns a response as a buf variable. The function can be used to download small files without saving them to disk.

HTTPPage( str url ) str

The HTTPPage function sends a GET request to the specified URL and returns a string response.

HTTPRequest( str url, str method, map.str params, map.str headers ) str

The HTTPRequest function sends an HTTP request to the specified URL and returns the response as a string. In the method parameter you need to specify the calling method - GET, POST, UPDATE, PUT, DELETE. The function also allows you to specify parameters and request headers. They are described as associative arrays where parameter name or header name is specified as a key. By default, the parameters are passed as form data when POST is called. If you want to send them in JSON format, then specify "Content-Type": "application/json; charset=UTF-8" in the headers parameter.

    map empty
    Println(HTTPRequest(TESTURL, "GET", empty, empty))
    map params = { `name`: `Jong Doe`, `id`: `101` }
    Println(HTTPRequest(TESTURL, "GET", params, empty))
    Println(HTTPRequest(TESTURL, "POST", params, empty))
    map headjson = { `Content-Type`: `application/json; charset=UTF-8` }
    Println(HTTPRequest(TESTURL, "POST", params, headjson))