To use the HttpRequest library:

Enable the wireless LAN with SysSetWLANPower function and initialize the wireless LAN with SysWLANInit function.
Sample
```
    SysSetWLANPower(SYS_WLAN_POWER_AUTO);
    SysWLANInit(NULL);
```
Initialize the HttpRequest library by calling the HTTP_InitHttpRequest function.
Sample
```
    HTTP_InitHttpRequest();
```

Call SysGetWLANConnectStatus function and wait until the wireless LAN is connected. In the meantime, you need to keep calling the Idle function.

Sample

    unsigned int waitStartTick;

    ...

    waitStartTick = GetTickCount();
    do{
        SysGetWLANConnectStatus(&status);
        if (status == SYS_WLAN_STATUS_CONNECTED)
            break;
        Idle();
    }while (GetTickCount() - waitStartTick < WLAN_CONNECTION_TIMEOUT);
    if (status != SYS_WLAN_STATUS_CONNECTED){
        // WLAN timeout error
        ...

    }

Define the content of the HTTP request with the HTTP_CreateRequest function and get the HTTP request handle.

Sample

    HTTP_REQUEST_HANDLE hRequest;

    ...

    hRequest = HTTP_CreateRequest(SERVER_URL, HTTP_REQ_GET, NULL,0,NULL,15000/20,0);
    if (!hRequest)
    {
        return xxxx_SERVER_CONNECTION_ERROR;
    }

Call the HTTP_GetResponse function to send the HTTP request and wait for the HTTP response to be received.

Sample

    int  result_code;
    char responsePhase;
    unsigned int responseStatus;
    char *content;
    unsigned int content_length;
    char *header;
    unsigned int headerLength;
    bool bExit = false;

    ...

    while (1)
    {
        //Wait for HTTP response
        if (!HTTP_GetResponse(
                hRequest, 
                &responsePhase, 
                &responseStatus, 
                &content, 
                &content_length, 
                &header,
                &headerLength))
        {
            result_code = xxxx_SYSTEM_ERROR;
            break;
        }
        switch(responsePhase)
        {
            case HTTP_REQUEST_CONNECTION_ERROR:
            case HTTP_REQUEST_SYSTEM_ERROR:
            case HTTP_REQUEST_TIMEOUT:
                result_code = xxxx_SERVER_CONNECTION_ERROR;
                bExit = true;
                break;

            case HTTP_REQUEST_FINISHED:
                if (responseStatus != 200)
                {
                    bExit = true;
                    result_code = xxxx_SERVER_RESPONSE_ERROR;
                    break;

                }
                // Got response....

                ....

                result_code = xxxx_SUCCESS;
                bExit = true;
                break;
        }
        if (bExit)
            break;
          
        Idle();
    }

Release the HTTP request resources with the HTTP_CloseRequest function.
Sample
```
    HTTP_CloseRequest(hRequest);
```
Release the resources of the HttpRequest library with the HTTP_DeinitHttpRequest function.
Sample
```
    HTTP_DeinitHttpRequest();
```
Disable the wireless LAN with SysSetWLANPower function.
Sample
```
    SysSetWLANPower(SYS_WLAN_POWER_OFF);
```

OPH-5000i SDK Manual

See also