View all our articles

Define a time limit in Go with Net/HTTP

In this guide, we'll show you how you can set a conversion time limit at PDFShift. This will allow you to define a maximum time for the conversion process to complete, and if the process takes longer than the defined time, the conversion will be aborted.

In some cases, this can be useful if you want the request to not be too long and then handle failure on your end depending on the result.

To do so, we use the timeout property, which is the maximum time in seconds that the request is allowed to take. If the request takes longer than the defined time, the conversion will be aborted.

package main

import (

func main() {
    // You can get an API key at
    apiKey := "sk_xxxxxxxxxxxx"

    params := map[string]interface{}{
        "source":  "",
        "timeout": 10,

    // Marshal the parameters into JSON
    jsonParams, err := json.Marshal(params)
    if err != nil {
        fmt.Println("Error marshaling JSON:", err)

    // Create a new HTTP client
    client := &http.Client{}

    // Create a new request
    req, err := http.NewRequest("POST", "", bytes.NewBuffer(jsonParams))
    if err != nil {
        fmt.Println("Error creating request:", err)

    // Set request headers
    req.Header.Set("Content-Type", "application/json")

    // Set basic authentication header
    auth := "api:" + apiKey
    req.Header.Set("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth)))

    // Perform the request
    resp, err := client.Do(req)
    if err != nil {
        fmt.Println("Error performing request:", err)
    defer resp.Body.Close()

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

    // Check response status code
    if resp.StatusCode >= 400 {
        fmt.Printf("Request failed with status code %d: %s\n", resp.StatusCode, string(body))

    // Save the PDF document
    err = ioutil.WriteFile("result.pdf", body, 0644)
    if err != nil {
        fmt.Println("Error saving PDF document:", err)

    fmt.Println("The PDF document was generated and saved to result.pdf")

In the above example, the conversion could fail if the conversion takes longer than 10 seconds.

For further details on the timeout property and its usage, please refer to our dedicated documentation.

We hope this guide was helpful. If you have any questions or noticed any issues on the code above,
feel free to drop us a line.