How to access the Azure App Service Log from a code with go lang

Question

Hi Community,

I want to access the Azure app service's log from an internal code using Golang. All I have is an access key. Please put some insights here.

I have my app service running on Azure,https://<prodserver>.scm.azurewebsites.net/ and the log files are maintained under /wwwroot/logs/.

If I want to access it from the browser, I am able to access through https://<prodserver>.scm.azurewebsites.net/wwwroot/logs/

But I want to access it from the code with GoLang. I have an access key to access the request. Can someone please help me to achieve this? When I am using Access Key in the code, I am getting https status code 403.

Can some one help me how to access these log files without any hindrance??

Answer 1

Hi @Anonymous
Sorry for the delay Response.
Based on your updated Go code and error details, the 401 Unauthorized error indicates that the access key being used for authentication is invalid or is not being applied correctly.

• Download the Publishing Profile from your App Service in the Azure Portal.
• Extract the username and password from the .PublishSettings file.
• Encode the credentials as username:password in Base64 auth := base64.StdEncoding.EncodeToString([]byte("<username>:<password>"))
• Use the Authorization header with Basic authentication req.Header.Set("Authorization", "Basic "+auth)
• Use the correct Kudu API URL https://<app-service-name>.scm.azurewebsites.net/api/vfs/site/wwwroot/logs/
• Updated Code .

    package main
    import (
    	"encoding/base64"
    	"fmt"
    	"io/ioutil"
    	"log"
    	"net/http"
    )
    func main() {
    	username := "<username-from-publishing-profile>"
    	password := "<password-from-publishing-profile>"
    	url := "https://<app-service-name>.scm.azurewebsites.net/api/vfs/site/wwwroot/logs/"
    	// Prepare Basic authentication header
    	auth := base64.StdEncoding.EncodeToString([]byte(username + ":" + password))
    	// Create HTTP GET request
    	req, err := http.NewRequest("GET", url, nil)
    	if err != nil {
    		log.Fatalf("Error creating request: %v", err)
    	}
    	req.Header.Set("Authorization", "Basic "+auth)
    	// Execute the request
    	client := &http.Client{}
    	resp, err := client.Do(req)
    	if err != nil {
    		log.Fatalf("Request failed: %v", err)
    	}
    	defer resp.Body.Close()
    	// Handle response
    	if resp.StatusCode != http.StatusOK {
    		log.Fatalf("Error: %s", resp.Status)
    	}
    	body, err := ioutil.ReadAll(resp.Body)
    	if err != nil {
    		log.Fatalf("Error reading response body: %v", err)
    	}
    	// Print log files
    	fmt.Println(string(body))
    }
  

• Use curl to validate curl -u <username>:<password> https://<app-service-name>.scm.azurewebsites.net/api/vfs/site/wwwroot/logs/
  If the answer is helpful, please click Accept Answer and kindly upvote it so that other people who faces similar issue may get benefitted from it.