What Go packages are required for the generated code?

The generated Go code typically uses standard library packages like net/http, encoding/json, bytes, io/ioutil, and fmt. For more complex requests, it might also use mime/multipart for file uploads or context for timeouts.

Does the Go code handle error checking?

Yes, the generated Go code includes comprehensive error handling following Go's idiomatic approach of checking errors after each operation that might fail.

How can I process the response in Go?

For JSON responses, use json.Unmarshal() to parse the response body into a struct or map. For other formats, you can process the raw response body as needed using the appropriate Go packages.

Do I need to install any packages to use the generated code?

No, the generated Go code uses only standard library packages that come with Go installation. No third-party dependencies are required.

How do I convert a curl command with file upload to Go?

For file uploads in Go, the converter generates code using the mime/multipart package to create a multipart form and the os package to read the file from disk.

Curl to Go Converter

Convert curl commands to Go code - Generate ready-to-use Go net/http code for API requests

Privacy Notice: This professional tool provides secure conversion to Go code with enterprise-grade privacy protection. We do not store any data you submit, ensuring complete confidentiality for your API development work.

Go Code Generator

// Go code will appear here
// Example:
package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
)

func main() {
	url := "https://api.example.com/data"
	
	// Create request payload
	payload := map[string]interface{}{
		"name": "test",
	}
	
	jsonData, err := json.Marshal(payload)
	if err != nil {
		fmt.Println("Error marshaling JSON:", err)
		return
	}
	
	// Create request
	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}
	
	// Add headers
	req.Header.Set("Content-Type", "application/json")
	
	// Send request
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		fmt.Println("Error sending request:", err)
		return
	}
	defer resp.Body.Close()
	
	// Read response
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("Error reading response:", err)
		return
	}
	
	fmt.Println("Status:", resp.Status)
	fmt.Println("Response:", string(body))
}

Common curl Commands for Go API Testing

Here are some common curl commands that you can convert to Go code:

Basic GET request: curl https://api.example.com/users
POST with JSON data: curl -X POST -H "Content-Type: application/json" -d '{"name":"John","email":"[email protected]"}' https://api.example.com/users
PUT with authentication: curl -X PUT -H "Authorization: Bearer token123" -d '{"status":"active"}' https://api.example.com/users/1
DELETE request: curl -X DELETE https://api.example.com/users/1
Custom headers: curl -H "X-API-Key: abc123" -H "Accept: application/json" https://api.example.com/data

Go HTTP Examples

Go's net/http package provides a powerful and efficient way to make HTTP requests. Here are some common Go HTTP patterns:

File Upload with Go

package main

import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"mime/multipart"
	"net/http"
	"os"
	"path/filepath"
)

func main() {
	url := "https://api.example.com/upload"
	
	// Create a buffer to store the multipart form
	var requestBody bytes.Buffer
	multipartWriter := multipart.NewWriter(&requestBody)
	
	// Open the file
	file, err := os.Open("document.pdf")
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer file.Close()
	
	// Create a form file field
	fileWriter, err := multipartWriter.CreateFormFile("file", filepath.Base("document.pdf"))
	if err != nil {
		fmt.Println("Error creating form file:", err)
		return
	}
	
	// Copy the file content to the form field
	_, err = io.Copy(fileWriter, file)
	if err != nil {
		fmt.Println("Error copying file to form:", err)
		return
	}
	
	// Add other form fields if needed
	multipartWriter.WriteField("description", "Sample document upload")
	
	// Close the multipart writer
	multipartWriter.Close()
	
	// Create request
	req, err := http.NewRequest("POST", url, &requestBody)
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}
	
	// Set the content type with the boundary
	req.Header.Set("Content-Type", multipartWriter.FormDataContentType())
	req.Header.Set("Authorization", "Bearer YOUR_TOKEN_HERE")
	
	// Send request
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		fmt.Println("Error sending request:", err)
		return
	}
	defer resp.Body.Close()
	
	// Read response
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("Error reading response:", err)
		return
	}
	
	fmt.Println("Status:", resp.Status)
	fmt.Println("Response:", string(body))
}

Go HTTP with Timeout and Error Handling

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"time"
)

func main() {
	// Create a context with timeout
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	
	// Create request
	req, err := http.NewRequestWithContext(ctx, "GET", "https://api.example.com/data", nil)
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}
	
	// Send request
	client := &http.Client{}
	resp, err := client.Do(req)
	
	// Handle errors
	if err != nil {
		if ctx.Err() == context.DeadlineExceeded {
			fmt.Println("Request timed out")
		} else {
			fmt.Println("Error sending request:", err)
		}
		return
	}
	defer resp.Body.Close()
	
	// Check status code
	if resp.StatusCode != http.StatusOK {
		fmt.Printf("Server returned non-200 status: %s\n", resp.Status)
		body, _ := ioutil.ReadAll(resp.Body)
		fmt.Println("Response body:", string(body))
		return
	}
	
	// Read and parse response
	var data map[string]interface{}
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("Error reading response:", err)
		return
	}
	
	err = json.Unmarshal(body, &data)
	if err != nil {
		fmt.Println("Error parsing JSON:", err)
		fmt.Println("Raw response:", string(body))
		return
	}
	
	fmt.Println("Successfully received data:", data)
}

How to Use the Go Code Converter

1. Basic Usage

Copy your curl command → Paste into the input box → Get Go code instantly

2. Implement Proper Error Handling

// Always check for errors in Go
resp, err := client.Do(req)
if err != nil {
	fmt.Println("Error sending request:", err)
	return
}
defer resp.Body.Close()

// Check status code
if resp.StatusCode != http.StatusOK {
	fmt.Printf("Server returned non-200 status: %s\n", resp.Status)
	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Println("Response body:", string(body))
	return
}

3. Use Context for Timeouts

// Create a context with timeout
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()

// Create request with context
req, err := http.NewRequestWithContext(ctx, "GET", "https://api.example.com/data", nil)
if err != nil {
	fmt.Println("Error creating request:", err)
	return
}

// Send request
client := &http.Client{}
resp, err := client.Do(req)

// Check for timeout
if err != nil {
	if ctx.Err() == context.DeadlineExceeded {
		fmt.Println("Request timed out")
	} else {
		fmt.Println("Error sending request:", err)
	}
	return
}

Frequently Asked Questions about Go HTTP Requests

Q: How does Go's HTTP client differ from curl?

A: While curl is a command-line tool for making HTTP requests, Go's net/http package provides a programmatic API. Go offers stronger typing, built-in concurrency support, and better integration with your application code, whereas curl excels at quick ad-hoc testing and scripting.

Q: Why does Go use defer for closing response bodies?

A: Go uses defer resp.Body.Close() to ensure resources are properly released even if errors occur later in the function. This pattern is idiomatic in Go and prevents resource leaks that could occur if you forget to close the body in all possible code paths.

Q: How do I handle streaming responses in Go?

A: Instead of using ioutil.ReadAll(), you can process the response body as a stream using io.Copy() or by reading chunks with a buffer. This is especially useful for large responses where loading the entire body into memory would be inefficient.

Q: Can I reuse HTTP clients in Go?

A: Yes, and it's recommended! Creating a single http.Client and reusing it across requests allows connection pooling and improves performance. The client is concurrency-safe and can be shared between goroutines without additional synchronization.

Q: How do I implement request cancellation in Go?

A: Go's context package provides elegant request cancellation. Create a context with context.WithCancel() or context.WithTimeout(), then pass it to http.NewRequestWithContext(). You can cancel the request at any time by calling the cancel function.

Q: What's the equivalent of curl's -k/--insecure flag in Go?

A: To skip TLS certificate verification (like curl's -k flag), configure a custom Transport in your HTTP client: client := &http.Client{Transport: &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}}} However, this should only be used for testing, as it bypasses security checks.

Q: How do I handle redirects in Go compared to curl?

A: Go's HTTP client follows redirects automatically (up to 10 by default), similar to curl. To customize this behavior, set a custom CheckRedirect function in your HTTP client to control redirect handling or prevent redirects entirely.

Curl Command Reference for Go API Testing

Understanding curl commands is essential for effective Go API testing. Here's a quick reference of common curl options that our converter supports:

Basic curl Syntax

curl [options] [URL]

Common curl Options

-X, --request METHOD: Specify request method (GET, POST, PUT, DELETE, etc.)
-H, --header LINE: Add header to the request
-d, --data DATA: Send data in POST request
-F, --form CONTENT: Submit form data
-u, --user USER:PASSWORD: Server user and password
-k, --insecure: Allow insecure server connections
-I, --head: Show document info only
-v, --verbose: Make the operation more verbose
-s, --silent: Silent mode
--connect-timeout SECONDS: Maximum time for connection

Converting Complex curl Commands

Our Go converter handles complex curl commands including multiple headers, authentication, data payloads, and various options. Simply paste your curl command and get clean, modern Go code using the net/http package.

Go HTTP Best Practices

When working with Go's net/http package, follow these best practices for efficient and secure API interactions:

1. Always Close Response Body

resp, err := client.Do(req)
if err != nil {
	fmt.Println("Error sending request:", err)
	return
}
defer resp.Body.Close() // Important: prevents resource leaks

2. Use Custom HTTP Client

client := &http.Client{
	Timeout: 10 * time.Second,
	Transport: &http.Transport{
		MaxIdleConns:        100,
		MaxIdleConnsPerHost: 20,
		IdleConnTimeout:     90 * time.Second,
	},
}

resp, err := client.Do(req)
if err != nil {
	fmt.Println("Error sending request:", err)
	return
}

3. Implement Comprehensive Error Handling

resp, err := client.Do(req)
if err != nil {
	var netErr net.Error
	if errors.As(err, &netErr) && netErr.Timeout() {
		fmt.Println("Request timed out")
	} else if errors.Is(err, context.DeadlineExceeded) {
		fmt.Println("Context deadline exceeded")
	} else {
		fmt.Println("Error sending request:", err)
	}
	return
}
defer resp.Body.Close()

// Check status code
if resp.StatusCode < 200 || resp.StatusCode >= 300 {
	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Printf("Error status: %d %s\n", resp.StatusCode, resp.Status)
	fmt.Printf("Response body: %s\n", string(body))
	return
}

// Read response
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
	fmt.Println("Error reading response body:", err)
	return
}

// Process response data
var result map[string]interface{}
if err := json.Unmarshal(body, &result); err != nil {
	fmt.Println("Error parsing JSON:", err)
	fmt.Println("Raw response:", string(body))
	return
}

4. Use Context for Timeout and Cancellation Control

// Create context with timeout
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel() // Important: prevents context leaks

// Create request with context
req, err := http.NewRequestWithContext(ctx, "GET", "https://api.example.com/data", nil)
if err != nil {
	fmt.Println("Error creating request:", err)
	return
}

// Send request
resp, err := client.Do(req)
// Error handling...

5. Use Structs for JSON Serialization and Deserialization

// Define request and response structs
type User struct {
	ID    int    `json:"id,omitempty"`
	Name  string `json:"name"`
	Email string `json:"email"`
}

// Create request data
user := User{
	Name:  "John Doe",
	Email: "[email protected]",
}

// Serialize to JSON
jsonData, err := json.Marshal(user)
if err != nil {
	fmt.Println("Error marshaling JSON:", err)
	return
}

// Create request
req, err := http.NewRequest("POST", "https://api.example.com/users", bytes.NewBuffer(jsonData))
// Set headers, send request, etc...

// Deserialize response
var responseUser User
if err := json.Unmarshal(body, &responseUser); err != nil {
	fmt.Println("Error parsing JSON response:", err)
	return
}
fmt.Printf("Created user with ID: %d\n", responseUser.ID)

Curl to Go Converter

Go Code Generator

Common curl Commands for Go API Testing

Go HTTP Examples

File Upload with Go

Go HTTP with Timeout and Error Handling

How to Use the Go Code Converter

1. Basic Usage

2. Implement Proper Error Handling

3. Use Context for Timeouts

Frequently Asked Questions about Go HTTP Requests

Q: How does Go's HTTP client differ from curl?

Q: Why does Go use defer for closing response bodies?

Q: How do I handle streaming responses in Go?

Q: Can I reuse HTTP clients in Go?

Q: How do I implement request cancellation in Go?

Q: What's the equivalent of curl's -k/--insecure flag in Go?

Q: How do I handle redirects in Go compared to curl?

Curl Command Reference for Go API Testing

Basic curl Syntax

Common curl Options

Converting Complex curl Commands

Go HTTP Best Practices

1. Always Close Response Body

2. Use Custom HTTP Client

3. Implement Comprehensive Error Handling

4. Use Context for Timeout and Cancellation Control

5. Use Structs for JSON Serialization and Deserialization

Convert curl to Other Languages