PDF to HTML - Golang Guide

This page serves as a guide for using the Pdfcrowd API to convert PDF to HTML in Golang applications. The API is designed for easy use and straightforward integration.

go get github.com/pdfcrowd/pdfcrowd-go

Quick Start

Below are Golang examples to help you quickly get started with the API. Explore our additional examples for more insights.

package main

import (
    "os"
    "fmt"
    "github.com/pdfcrowd/pdfcrowd-go"
)

func main() {
    // create the API client instance
    client := pdfcrowd.NewPdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d")

    // run the conversion and write the result to a file
    err := client.ConvertFileToFile("/path/to/logo.pdf", "logo.html")

    // check for the conversion error
    handleError(err)
}

func handleError(err error) {
    if err != nil {
        why, ok := err.(pdfcrowd.Error)
        if ok {
            os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error: %s\n", why))
        } else {
            os.Stderr.WriteString(fmt.Sprintf("Generic Error: %s\n", err))
        }

        panic(err.Error())
    }
}

package main

import (
    "os"
    "fmt"
    "github.com/pdfcrowd/pdfcrowd-go"
)

func main() {
    // create the API client instance
    client := pdfcrowd.NewPdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d")

    // run the conversion and write the result to a file
    err := client.ConvertUrlToFile("https://pdfcrowd.com/static/pdf/apisamples/invoice.pdf", "invoice.html")

    // check for the conversion error
    handleError(err)
}

func handleError(err error) {
    if err != nil {
        why, ok := err.(pdfcrowd.Error)
        if ok {
            os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error: %s\n", why))
        } else {
            os.Stderr.WriteString(fmt.Sprintf("Generic Error: %s\n", err))
        }

        panic(err.Error())
    }
}

package main

import (
    "os"
    "fmt"
    "github.com/pdfcrowd/pdfcrowd-go"
    "io/ioutil"
)

func readFile(fileName string) []byte {
    content, err := ioutil.ReadFile(fileName)
    handleError(err)
    return content
}

func main() {
    // create the API client instance
    client := pdfcrowd.NewPdfToHtmlClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d")

    // run the conversion and write the result to a file
    err := client.ConvertRawDataToFile(readFile("/path/to/hello_world.pdf"), "logo.html")

    // check for the conversion error
    handleError(err)
}

func handleError(err error) {
    if err != nil {
        why, ok := err.(pdfcrowd.Error)
        if ok {
            os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error: %s\n", why))
        } else {
            os.Stderr.WriteString(fmt.Sprintf("Generic Error: %s\n", err))
        }

        panic(err.Error())
    }
}

Authentication

To access the API, you will need to use your Pdfcrowd username and API key. For initial testing, you may use the following demo credentials without registering:

• Username: demo
• API key: ce544b6ea52a5621fb9d55f8b542d14d

To obtain your personal API credentials, consider starting a free API trial or purchasing the API license.

Error Handling

It is recommended that you implement error handling to catch errors the API may return. Effective error handling is vital as it ensures application stability and provides clearer diagnostics. See the example code below for guidance on implementing error handling, and refer to this list of status codes for more information.

// call the API 

    // print the error
    os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error: %s\n", why))

    // print the error code
    os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error Code: %v\n", why.getCode()))

    // print the error message
    os.Stderr.WriteString(fmt.Sprintf("Pdfcrowd Error Message: %v\n", why.getMessage()))

Troubleshooting

• If you are receiving an error, refer to the API Status Codes for more information.
• Utilize setDebugLog() and getDebugLogUrl() to obtain detailed information about the conversion process, including load errors, load times, browser console output, etc.
• Consult the FAQ for answers to common questions.
• Contact us if you need assistance or if there is a feature you are missing.

API Method Reference

Refer to the PDF to HTML Golang Reference for a description of all API methods.