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How to extract text from pdf and doc file without downloading

I have searched a lot before asking that question. I have a program(java) which crawls some wep pages and trying to find some .doc and .pdf files and it can download them but only one .pdf or .doc can cover up to 3-4mb which is not good because there are millions of files.. so I decied to extract their text without downloading the whole file. Basically, I need to see pdf or doc file online and download their text only but I could not figure out how to do that. If necessary I can provide my code.
Edit:This question can be closed now since I got the idea and (no)solution.
Thanks for help.
And What's up with those downgrades on question ?

That is not possible. You can only start extracting the document once you download the bytes.
(unless you also have control over the server, you could do the extraction server-side and provide a txt download link)

Reading a file from a website on the Internet without downloading it is impossible.
If you have control of the server you could write a web service that can parse the files on demand and extract the parts you are interested in, which would then be sent to the client.
If not, and if you're up for a more challenging problem, you could write an HTTP client that starts downloading the file and parses it on the fly, downloading only as much as you need to extract the part(s) you need. This might or might not be feasible (or worthwhile) depending on where in the files the "interesting" bits were located. If they're close to the beginning in most cases then you might be able to reduce the download size significantly.
A detailed explanation of how to accomplish this is probably beyond the guidelines for StackOverflow answer length.

PDF Open Office or MS Word

I am new to java, I have to read a PDF, Open Office or MS Word file and make changes in the file and render as PDF document on my web page. Please someone tell me which of these file's API or SDK is easy to use and also tell me best SDK for this. So I can read, Update and render easily. file also contains Table but there is no image.

We use Apache POI to read Microsoft Office files. There are many libraries for PDF in Java. iText is something I have used. Once you pick the tools, do a selective search on Stack Overflow. There are plenty of discussions around these tools.

Depending on the types of updates you are doing, modifying PDF is going to be a problem - it's not intended for editing. You might have to find some way of converting the PDF to something first, then edit. Depending on the types of changes you want to make and the documents you are working from even editing DOC and Writer files is going to be tricky. They are all different formats.
As Jayan mentioned, iText and POI may help you a little. OpenOffice Writer documents can be edited by unzipping then modifying the XML or using the UNO API. Word documents can be editied by using MS Office automation (bad idea), converting to OpenOffice first then editing, or if DOCX, unzipping and processing the XML.
Good luck.

Record Audio As Mp3

I want to record audio and save to my server as mp3 files, i googled and find like this
But it is not free and open source
How can i record audio as mp3 in java and php ?

In terms of Java, you could record with standard Java sound and then use something like lameonj to do the mp3 encoding - all free tools!

This question is the same as yours and the person was able to come up with a solution (which he posted as an answer).
A little additional information. It is possible to record sound in an applet. See this page for information on Java Sound and applets. You'll need to sign your applet, which isn't hard to do. The answer to question 5 doesn't mention this but you can create your own (untrusted) certificate with which to do the signing. This question here on SO has some information on self-signing code.

I solved my problem, I used lame library to encode mp3, If you want to pure code to encode mp3, you can use this
Its using java based lame library

how to convert a HTML web page into a PDF file using Java

i've been searching on the internet on how to convert a HTML page into a PDF file using Java. i found a lot of pointers, and in short, they don't work or are too difficult to implement. i also downloaded a commercial product, pdf4ml; the API is something i'd be happy to work with, except that when i crawled a simple page on wikipedia, i get a out of memory error (setting Xmx to 1024 M). in some approaches, they suggest converting HTML -> XHTML -> FO -> PDF. however, i am getting a lot of exceptions for the XHTML-to-FO XLS file; and reading the documentations, it's not something that i have enough time to understand right now.
here are my questions/concerns.
1. is there another cohesive API out there that will easily convert HTML to PDF (commercial or not)?
2. is there a way i can simply capture a HTML page and store it as a single file. this approach would be similar to using internet explorer's way of saving a web page as a web archive (single file, MHT format)?
any help is appreciated. (btw, i know this question has been asked repeatedly, but in addition to the original spirit of the question, i'm opened to other ways). thanks.

Try wkhtmltopdf, which is using WebKit. Another option (I'm using that currently) is using OpenOffice (remote controlled via macros).

you may use iText open source Java lib for that, and read this
or use YaHPConverter open source Java lib.
or do this whith help of icepdf popular open source lib
or use pd4ml, but it not free, only trial.
or use this, and this is man for it.

My 2 cents using opensource tools:
You can use either Capture screenshots with Selenium or WebDriver to save html page's screenshot in an image file from your Java code. And once you have image file you can convert it to pdf again from your Java code.
EDIT:
It seems you can do all that in 1 step using itext Html to Pdf

I am not sure but you could Try
1) cobra html rendering engine http://lobobrowser.org/cobra.jsp
2) htmleditorkit -- part of jdk
3) JWebPane
Use the rendering kit to parse and render html. The rendered out put is a swing component. Swing component can be used by itext to generate pdf file out put

You can try out Pdfcrowd. It is an easy to use commercial online API with many options and with support for Java.
It can create PDF either from web pages or raw HTML code.

Unable to parse pdf by Jpedal

I'm facing a problem while parsing a PDF with Jpedal.
While reading the wordlist from the Jpedal, I get garbled characters in the wordslist. This also happens when using OCR, and when I copy the text from PDF and paste in Word or a simple text editor. What I understand is this PDF was generated by Quartz PDF context on MAC OS X 10.6.4, which is used to compress the file size, but iseasily viewable on PDF viewers. I searched for any Java API supporting for decoding this kind of PDF but was unsuccessful. I'm looking for any application or Java API which I can use to decode it; must be usable on a Linux machine.

Hye everybody
I'm posting a possible solution for problem. Here is link describing how quartz parse the pdf and of course which need to be implemented in code cause till now I didn't found any readymade API for it and I believe that stackoverflow is all about taking initiative and do and answer the questions which not been done or asked before.
regards
Rituraj