Webpage login -> download file
lazarus / 38-Networking and Web Programming

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Haraldsen · 2014-03-25 18:28

How to download a file from a web page with Lazarus?
The file cant be accessed until we are logged in:

Code: [Select]<form action="/login.php" method="post" class="padder">

<p>Your Username/Email:<input type="text" name="email" /></p>
<p>Your Password:<input type="password" name="password" /></p>

<p><label><input type="checkbox" name="remember" value="1"
checked="checked" />

Remember Me</label></p>
<p><input type="submit" value="Log In" /></p>
Here's the link to file:
http://www.somesite.com/repository.php?file=data&no=000001

Have started looking at Synapse for this, but no success so far. Maybe
you have other suggestions for this task?  Fpweb?

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BeniBela · 2014-03-26 10:35

You can use my internet tools for login (do I have to post this every
time?? use the forum search):

Code: [Select]uses simpleinternet;
httpRequest(process('http://www.somesite.com/repository.php?file=data&
no=000001', 'form(//form, {"email": "your login", "password": "your
password"})'));
httpRequest('http://www.somesite.com/repository.php?file=data&no=00000
1')

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BigChimp · 2014-03-26 10:43

@BeniBela: yes, you have to post this every single time because people
are too lazy to read documentation, search forum or wiki, properly
describe their problems etc.
There are some exceptions and I'm glad of them.

@Haraldsen:
Using synapse:
http://article.gmane.org/gmane.comp.lang.delphi.synapse.public/4185

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Haraldsen · 2014-03-28 18:21

@BeniBela: Downloading worked immediately with your tools! Thank you!
Without the example of syntax you wrote to me, it would have been
impossible.

The result of a httpRequest is always a string. Can it download a
binary file? (Couldn't find anything about that in the docs).

You seem to have produced a quality piece of software. Documentation
with examples of use and examples of syntax could make it more
popular.

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BeniBela · 2014-03-28 22:25

Quote from: Haraldsen on March 28, 2014, 07:21:49 pm
The result of a httpRequest is always a string. Can it download a
binary file? (Couldn't find anything about that in the docs).

Yes. The string is just a sequence of chars/bytes

(string is easier to use than a TStream, since it is ref-counted)

(perhaps I have to change the return type for fpc 2.8 )

Quote from: Haraldsen on March 28, 2014, 07:21:49 pmYou seem to have
produced a quality piece of software. Documentation with examples of
use and examples of syntax could make it more popular.

There is already a lot of pasdoc generated documentation on my webpage
about it.

(Most of) The syntax is now standard XQuery + JSONiq there are
examples on the internet (e.g. wikipedia)