如何配置MS Flow的Post请求调用Docker部署的PdfReactor REST API转HTML为PDF

Got it, let's walk through how to set up that HTTP POST request for PDFreactor in Docker with Microsoft Flow—this should get your HTML-to-PDF conversion working smoothly.

First, make sure you have the correct endpoint for your running PDFreactor container. By default, the REST API endpoint is:
http://<your-docker-host-ip>:9423/service/rest

To verify the service is reachable, you can test it with a simple curl command or Postman:

curl http://localhost:9423/service/rest

You should get a JSON response confirming the API is active. If not, double-check your Docker port mapping (you need -p 9423:9423 in your docker run command to expose the port).

Now let's build the request in Flow:

• Add an HTTP action to your Flow, set the method to POST
• Paste your PDFreactor endpoint into the URI field
• Under Headers, add a key-value pair:
  • Key: Content-Type
  • Value: application/json
• For the Body, use a JSON payload tailored to your HTML source. Here are two common scenarios:

Scenario 1: Directly embed HTML content #

If you have the HTML inline or stored as a variable in Flow, use this payload:

{
  "content": "<!DOCTYPE html><html><body><h1>My Converted PDF</h1><p>This is a test from Microsoft Flow + PDFreactor</p></body></html>",
  "outputFormat": "PDF",
  "pageSize": "A4",
  "margin": {"top": "2cm", "bottom": "2cm", "left": "1.5cm", "right": "1.5cm"}
}

Scenario 2: Pull HTML from a file (e.g., SharePoint) #

If your HTML is stored in a file, first add a Get file content action to retrieve the HTML text, then reference it in the payload:

{
  "content": "@{body('Get_file_content')}",
  "outputFormat": "PDF"
}

PDFreactor returns the PDF as binary data in the response body. To save it:

• Add a Create file action (e.g., for SharePoint, OneDrive, or Azure Blob Storage)
• Set the File content to the Body output from your HTTP action
• Define a filename (e.g., converted-document.pdf)

• CORS Issues: If Flow throws a cross-origin error, update your PDFreactor Docker config to allow Flow's domain. You can add a CORS_ALLOWED_ORIGINS environment variable when starting the container.
• External Resources: If your HTML references images/CSS from external URLs, ensure the Docker container has network access to those resources.
• API Limits: Check PDFreactor's documentation for rate limits or payload size restrictions if you're converting large HTML files.

内容的提问来源于stack exchange，提问作者JaDDeL