How to convert PDF to JPEG from URL asynchronously for PDF to image API in PowerShell using PDF.co Web API

Tutorial: how to convert PDF to JPEG from URL asynchronously for PDF to image API in PowerShell

Writing of the code to convert PDF to JPEG from URL asynchronously in PowerShell can be done by developers of any level using PDF.co Web API. PDF.co Web API helps with PDF to image API in PowerShell. PDF.co Web API is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

The SDK samples like this one below explain how to quickly make your application do PDF to image API in PowerShell with the help of PDF.co Web API. Sample code in PowerShell is all you need. Copy-paste it to your the code editor, then add a reference to PDF.co Web API and you are ready to try it! Tutorials are available along with installed PDF.co Web API if you’d like to dive deeper into the topic and the details of the API.

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ConvertPdfToJpegFromUrlAsynchronously.ps1

      
# Cloud API asynchronous "PDF To JPEG" job example.
# Allows to avoid timeout errors when processing huge or scanned PDF documents.

# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co/documentation/api
$API_KEY = "***********************************"

# Direct URL of source PDF file.
$SourceFileUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-to-image/sample.pdf"
# Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
$Pages = ""
# PDF document password. Leave empty for unprotected documents.
$Password = ""
# (!) Make asynchronous job
$Async = $true


# Prepare URL for `PDF To JPEG` API call
$query = "https://api.pdf.co/v1/pdf/convert/to/jpg"

# Prepare request body (will be auto-converted to JSON by Invoke-RestMethod)
# See documentation: https://apidocs.pdf.co
$body = @{
    "password" = $Password
    "pages" = $Pages
    "url" = $SourceFileUrl
    "async" = $Async
} | ConvertTo-Json

try {
    # Execute request
    $response = Invoke-WebRequest -Method Post -Headers @{ "x-api-key" = $API_KEY; "Content-Type" = "application/json" } -Body $body -Uri $query

    $jsonResponse = $response.Content | ConvertFrom-Json

    if ($jsonResponse.error -eq $false) {
        # Asynchronous job ID
        $jobId = $jsonResponse.jobId
        # URL of generated JSON file available after the job completion; it will contain URLs of result PDF files.
        $resultJsonFileUrl = $jsonResponse.url

        # Check the job status in a loop. 
        do {
            $statusCheckUrl = "https://api.pdf.co/v1/job/check?jobid=" + $jobId
            $jsonStatus = Invoke-RestMethod -Method Get -Headers @{ "x-api-key" = $API_KEY } -Uri $statusCheckUrl

            # Display timestamp and status (for demo purposes)
            Write-Host "$(Get-date): $($jsonStatus.status)"

            if ($jsonStatus.status -eq "success") {
                # Download JSON file with URLs of result PDF files
                $jsonJpegUrls = Invoke-RestMethod -Method Get -Uri $resultJsonFileUrl

                # Download generated JPEG files
                $part = 1;
                foreach ($url in $jsonJpegUrls) {
                    $localFileName = ".\page$($part).jpg"

                    Invoke-WebRequest -Headers @{ "x-api-key" = $API_KEY } -OutFile $localFileName -Uri $url

                    Write-Host "Downloaded `"$($localFileName)`""
                    $part++
                }
                break
            }
            elseif ($jsonStatus.status -eq "working") {
                # Pause for a few seconds
                Start-Sleep -Seconds 3
            }
            else {
                Write-Host $jsonStatus.status
                break
            }
        }
        while ($true)
    }
    else {
        # Display service reported error
        Write-Host $jsonResponse.message
    }
}
catch {
    # Display request error
    Write-Host $_.Exception
}

run.bat

      
@echo off

powershell -NoProfile -ExecutionPolicy Bypass -Command "& .\ConvertPdfToJpegFromUrlAsynchronously.ps1"
echo Script finished with errorlevel=%errorlevel%

pause

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