How To Write on PDF Online?
Easy-to-use PDF software
What are the best practices in writing RESTful APIs to return content that contains both HTML and PDF content?
Use The HTTP client package of your programming language. If you’re in PHP, that would look like Guzzle, and PHPUnit. You could couple those to write a decent integration test. thats plenty low-level enough to do everything you need with respect to validating the request, response, latency, data types, and status codes (as well as any weird stuff that happens). server side, I would suggest mocking things out though quite a bit so you can validate specific areas of the application (e.g, stub out the repository if you’re just testing the action and routing).
Write on PDF: All You Need to Know
If it seems overwhelming, let me point out a good place to start. Start small, and grow into it. There is plenty to be learned, and there are lots of resources. That said, if you get stuck and want me to write out an example for you (or another developer) to follow along with that can help you find a better way, I'm happy to help. This is also very helpful if you’re trying to figure out what to do to implement your own HTTP services.