Login to website using windows application and download attachment from the website

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Hi,

I have a problem to login website from windows application. After login in website need to download attachment of the website orders.

What I have tried:

I have tried to browse the link but unable to pass username and password to the website to login on website and read website code.

Posted 27-Sep-18 5:25am

Patel Shailendra

Updated 27-Sep-18 7:05am

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Richard MacCutchan 27-Sep-18 11:33am

Maybe they don't want you to login and steal their information.

Patel Shailendra 27-Sep-18 11:36am

We are doing their data entry job in that cases we have login details for the website. We want to download attachments automatically instead of manual work.

Richard MacCutchan 27-Sep-18 12:41pm

Well you need to provide much more information if you want help on this. Web scraping is not excessively complicated, but you must emulate a real user entering the details. Maybe a Google search for web scraping will get you some useful sample code.

Afzaal Ahmad Zeeshan 27-Sep-18 11:41am

Do they have an API that you will be using?

Patel Shailendra 27-Sep-18 11:43am

No, We don't want to inform client that we are using some automate work.

Afzaal Ahmad Zeeshan 27-Sep-18 11:50am

We want to download attachments automatically instead of manual work.

Then how in the Windows application are you doing this? You must be using some method of HTTP communication.

Patel Shailendra 27-Sep-18 11:52am

Yes, Currently we are not doing, we are trying to automatically download files by using login details of website from window application and download related attachment from the website by just passing jobid as parameter to the website link.

We can only access that link after login. Without login we are unable to browse that page. When we try to directly browse the link of the website we are getting login page html code.

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Afzaal Ahmad Zeeshan · Answer 1 · 2018-09-27T07:06:00

In this problem of yours, a very easier way would be if there can be found some of their APIs or libraries that can let you do this.

But since you do not intend to use, or perhaps the service does not expose an API, the only way to do this is using an external library that will allow you to parse and validate the HTML response that you get back. For example, HtmlAgilityPack[^] is one of such libraries that I used to consume in my own apps back in the days. Use this library to work around with the HTML pages, and send new requests, get responses for the pages.

HttpClient Class (System.Net.Http) | Microsoft Docs[^]

One problem with this is, that your HTTP clients might not be able to send the HTTP cookies, please see this link to find out how your cookies would be shared by a real browser, How are cookies passed in the HTTP protocol? - Stack Overflow[^]