![]() ![]() Knowing that, we write the following request (using axios here, but it can be any other http client lib) to retrieve the PDF binary. In other words: your clients don't know the PDF they're receving was retrivied using a secret api key from an external service. Because of that, your services have to handle the request by themselves and respond the same PDF file retrieved from external services to your clients. This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean. This key cannot be passed to your API clients. The flow of program as I have thought would be as follows: Get PDF file -> Convert each page to image using Ghost4j -> Pass each image to tess4f for OCR -> convert whole text to base64. ![]() You can use these methods at the following levels. This class provides three different encoders and decoders to encrypt information at each level. You need to import 64 in your source file to use its methods. You can encrypt and decrypt your data by using provided methods. Since I am working in Java, I am using terr4j library for this. Java provides a class Base64 to deal with encryption. Let's simulate the following scenario: your API services need to request a PDF file to another external API service using a secret api key. I am using Tesseract OCR for converting scanned PDFs to text files. You are definitively correct! □ The first solution The code I have mentioned here works well if the size of pdf file is less than 1MB, above that it opens a blank window without any content. ![]() Now, in our system we need to convert it back to pdf and open it in browser/acrobat. However, what happens when services requirements don't allow you to respond with a binary content-type? The first solution it may come to your head is to convert it to base64 encoded string and then transport that to your response, right? We get the base64 encoded pdf files from different system via webservice in an string format (no URL, the entire file). Here is an example that demonstrates how to convert PDF to PDFA in Java. How can I convert a PDF to Base64 The PdfDocument object doesnt contain a property to get Base64 directly, though you can get the byte. There are many times you need request a PDF file (or any other file) to external servers and then save it, or forward it to a client of your services. Aspose.PDF for Java library referenced in your project. Today I would like to show you a really simple tip when you need to convert PDF binary file to base64 before transport it in a response to a client. ![]()
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