// sendRequest sends a request to the Azure management API using the given
// HTTP client and parameters. It returns the response from the call or an
// error.
func (client client) sendRequest(httpClient *http.Client, url, requestType, contentType string, data []byte, numberOfRetries int) (*http.Response, error) {
request, reqErr := client.createAzureRequest(url, requestType, contentType, data)
if reqErr != nil {
return nil, reqErr
}
response, err := httpClient.Do(request)
if err != nil {
if numberOfRetries == 0 {
return nil, err
}
return client.sendRequest(httpClient, url, requestType, contentType, data, numberOfRetries-1)
}
if response.StatusCode >= http.StatusBadRequest {
body, err := getResponseBody(response)
if err != nil {
// Failed to read the response body
return nil, err
}
azureErr := getAzureError(body)
if azureErr != nil {
if numberOfRetries == 0 {
return nil, azureErr
}
return client.sendRequest(httpClient, url, requestType, contentType, data, numberOfRetries-1)
}
}
return response, nil
}
// sendRequest sends a request to the Azure management API using the given
// HTTP client and parameters. It returns the response from the call or an
// error.
func (client client) sendRequest(httpClient *http.Client, url, requestType, contentType string, data []byte, numberOfRetries int) (*http.Response, error) {
absURI := client.createAzureRequestURI(url)
for {
request, reqErr := client.createAzureRequest(absURI, requestType, contentType, data)
if reqErr != nil {
return nil, reqErr
}
response, err := httpClient.Do(request)
if err != nil {
if numberOfRetries == 0 {
return nil, err
}
return client.sendRequest(httpClient, url, requestType, contentType, data, numberOfRetries-1)
}
if response.StatusCode == http.StatusTemporaryRedirect {
// ASM's way of moving traffic around, see https://msdn.microsoft.com/en-us/library/azure/ee460801.aspx
// Only handled automatically for GET/HEAD requests. This is for the rest of the http verbs.
u, err := response.Location()
if err != nil {
return response, fmt.Errorf("Redirect requested but location header could not be retrieved: %v", err)
}
absURI = u.String()
continue // re-issue request
}
if response.StatusCode >= http.StatusBadRequest {
body, err := getResponseBody(response)
if err != nil {
// Failed to read the response body
return nil, err
}
azureErr := getAzureError(body)
if azureErr != nil {
if numberOfRetries == 0 {
return nil, azureErr
}
return client.sendRequest(httpClient, url, requestType, contentType, data, numberOfRetries-1)
}
}
return response, nil
}
}