How To Convert PDF Online?
Easy-to-use PDF software
Is there any reliable Golang library which converts PDF file to Image file (jpeg, tiff, png etc.)?
What are you trying to do, exactly, and what do you mean by "in-memory file?" There's no such thing as an "in-memory file" — the only thing you ever have in memory is a sequence of bytes, perhaps read from a file. Indeed, that string you have is just such a sequence of bytes. For bytes that correspond to a printable character, Ruby displays the printable character. For bytes that don't, Ruby escapes the byte and uses its hexadecimal representation. In Ruby, the string "PNG\n" could also be written "\x50\x4E\x47\x0A", for example. That \x is an escape sequence which says to Ruby, "We have a byte represented in hexadecimal coming up." If you have a string like that you can simply write it to a file as you would any other string, like so. File.write("whatever.png", png_data) Ruby will read the sequence of bytes in the string and write them to whatever.png. The resulting file will be a valid PNG file, assuming png_data is valid PNG data. I think in Windows you might have to tell File.write to be in "binary mode" vs. "text mode." I don't know about that for sure, though, and I couldn't tell you the difference between the two. In any UNIX there's no difference — bytes go in, bytes go out. If by "in-memory file" you mean you need to take that string and pass it to another method that expects something which respects the IO interface then you can use StringIO (Ruby 2.1.0) to wrap your string in an object which does just that.
PDF documents can be cumbersome to edit, especially when you need to change the text or sign a form. However, working with PDFs is made beyond-easy and highly productive with the right tool.
How to Convert PDF with minimal effort on your side:
- Add the document you want to edit — choose any convenient way to do so.
- Type, replace, or delete text anywhere in your PDF.
- Improve your text’s clarity by annotating it: add sticky notes, comments, or text blogs; black out or highlight the text.
- Add fillable fields (name, date, signature, formulas, etc.) to collect information or signatures from the receiving parties quickly.
- Assign each field to a specific recipient and set the filling order as you Convert PDF.
- Prevent third parties from claiming credit for your document by adding a watermark.
- Password-protect your PDF with sensitive information.
- Notarize documents online or submit your reports.
- Save the completed document in any format you need.
The solution offers a vast space for experiments. Give it a try now and see for yourself. Convert PDF with ease and take advantage of the whole suite of editing features.
Convert PDF: All You Need to Know
In my example above I wrapped all the lines in a string and then passed that string to some_to_be_written which expects bytes. The resulting byte is then converted to character and passed back to the string wrapper. In Ruby 2.2.0, String(#to_f) will also automatically convert to a string. You can also write directly into the string — just pass all the bytes you want in, but leave the #to_f in the string. Using String is a huge improvement over String, and you should think to use it where you might otherwise use String (e.g.: creating a logger, if you want to write to a log file) or File (e.g.: writing data to a file). I wrote a bit about String in the previous post.