I am writing a c# agent to pull data out of Excel workbooks stored in Livelink but I am unable to download the files.
webClient = new WebClient();
webClient.Credentials = CredentialCache.DefaultCredentials;
webClient.DownloadFile(strFileLocation, TEMP_FILE_LOC);
This is the code I am using to save the file. strFileLocation is a link generated using the make link utility in Livelink and it is a http link
Here is the code
(http://LivelinkServer.com/Livelink/livelink.exe?func=ll.GetTZ&NextURL=%2FLivelink%2Flivelink%2Eexe%3Ffunc%3Dll%26objId%3D128027626%26objAction%3Ddownload%26viewType%3D1)
I get an excel document that has a progress bar that says "Please wait a moment while Livelink is loading..." this looks, to me, like the page that redirects the request in order to get the actual file.
I appears to use a double hop in order to direct you to the file on the Livelink server via the URL it gives you, but I do not know what webservice it calls, examining the response headers gives no clues.
Does anyone know how to correctly access a file on a Livelink sever?
Any help would be greatly appreciated, thank you.
You have to call the Web Service function (SOAP)
GetVersionContents(ID, versionNum)
to get the actual data from which you can create a local file.
Thankyou for your answers but after contacting my companies livelink department, I found that I need to access this service on a seprate port to allow the correct type of authentication
Related
Goal: Download documents from a Sharepoint 2010 Document Library using C#
I've searched and found many questions/resources regarding how to download documents to a local disk from a Sharepoint Document Library. I've so far been unable to successfully implement a solution.
For the sake of discussion, my document library is located at the following link:
http://server.domain.com/sites/CompanyLocation/dprtmnts/DepartmentName/MyLibraryName/Forms/AllItems.aspx
Within this document library are two folders, each containing a number of documents. I desire to retrieve a list of these documents (in each folder) and have the ability to download/open a document on command.
Things I've tried:
The linked post from this comment: https://sharepoint.stackexchange.com/a/105923
The linked post (https://stackoverflow.com/a/21056425/2480558) offers a solution for both downloading and uploading. I only need to download, so I tried that. This solution gives me a Microsoft.SharePoint.Client.ServerObjectNullReferenceException. There are no instructions on what the url, listTitle, or listItemId need to be, so I'm probably doing something wrong... it doesn't appear to be getting any files.
I also tried the first blog post on that answer that points to using a package from bendsoft. Apparently that package is a paid package, and it's quite expensive.. I can't go that route.
Another answer: https://stackoverflow.com/a/53733630/2480558
This gives me the following exception: (actual server edited out of exception)
Microsoft.SharePoint.Client.ClientRequestException: 'The IDCRL response header from server 'http://server.domain.com/' is not valid. The response header value is 'NTLM'. The response status code is 'Unauthorized'.
This solution: https://stackoverflow.com/a/15602003/2480558
Honestly, I don't even remember why that one didn't work.
If anyone has something that might help me get on the right path... I'm not familiar with making web requests and web authorization, or anything of that nature.
If you use the example that you found at https://stackoverflow.com/a/53733630/2480558, but you have to adapt it for your local SharePoint server, since that code is logging in to SharePoint Online.
In the public void Connect() definition, replace the line
clientContext.Credentials = new SharePointOnlineCredentials(UserName, securePassword);
with this instead:
clientContext.Credentials = new NetworkCredential(UserName, securePassword, "putYourADDomainNameHere");
I have been tasked with finding a way to save files given a link to someones amazon bucket. These files are attachments uploaded to a ticketing system, and when i used their API to pull the ticket out, i am given a link like the one below(I removed all the private stuff and replaced with XXXXX)
https://s3.amazonaws.com/cdn.XXXXXXX.com/data/helpdesk/attachments/production/36012348362/original/1.jpeg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=XXXXXXXXXXXXXXXXXFus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20180808T205357Z&X-Amz-Expires=86400&X-Amz-Signature=XXXXXXXXXXXXXX-Amz-SignedHeaders=Host
As you can see, the links time out after 1 day. I am connecting 2 API's together, and i need to be able to upload an actual file into the second API instead of just placing a link that times out after a day. I have tried to use Webclient downloadfileAsync, but all i get is a blank file output. I can go to the link in my browser and do a right click, save image as, so i know its possible, but i havent had any luck programatically. Below is the code snipped i am currently using to try and download it.
using (WebClient wc = new WebClient())
{
wc.DownloadFileAsync(new System.Uri(url), "image.jpg");
}
Any insight or help would be awesome.
Thanks in advance!
I was able to get this working by not using the async version of DownloadFile. Thanks to all the people who helped me resolve this.
I'm working on a continuing API project. The current issue at hand is to be able to download my data from the AtTask server in precisely the folder structure they exist in on the AtTask servers. I've got the folder creation working nicely; the data types between Document, Document Folder and Document Version seem to be pretty clear. I am a little disillusioned about the fact that extension isn't in the document object (that I have to refer to the document VERSION for that)... but I can see some of the reason for that from a design perspective.
The issue I'm running into now is that I need to get the file content. I originally through from the API documentation that I'd be able to get to the file contents the same way as the documentation recommends uploading it -- through the handle. Unfortunately, neither document nor docv seem to support me accessing the handle except to write a new file.
So that leaves me the "download URL" as the remaining option. If I build the UI strings from the API calls using my browser, I get a URL with https://attaskURL/document/download?ID=xxxx (and can also get the versionID and such). If I paste the url into the browser where I'm logged in to the user interface of AtTask, it works fine and I can download the file. If, instead, I use my C# code to do so, I get the login page returned as a stream for me to download instead of my actual file because I'm not authenicated. I've tried creating a network credential and attaching it to the request with the username and password, but to no avail.
I imagine there's a couple ways to solve this problem -- the easy one being finding a way to "log in" to the download site through code (which doesn't seem to be the usual network credential object in C#) OR find a way to access the file contents through the API.
Appreciate your thoughts!
It looks like you can use the download URL if you put a session id in the URL. The details on getting a session id are here (basically just call login and a session id is returned in JSON):
http://developers.attask.com/api-docs/#Authentication
Then cram it on the end of your document download URL:
https://yourcompany.attask-ondemand.com/document/download?ID=xxxx&sessionID=abc1234
I've given this a quick test and I'm able to access a document.
You can use the downloadURL and a sessionID IF you are not using SAML authentication.
I have tried it both ways and using SAML will redirect you to the login page.
This is my first time developing this kind of system, so many of these concepts are very new to me. Any and all help would be appreciated. I'll try to sum up what I'm doing as efficiently as possible.
Background: I have a web application running AngularJS with Bootstrap. The app communicates with the server and DB through a web service programmed using C#. On the site, users can upload files and reference them later using direct links. There's no restriction to file type (yet), so just about anything is allowed.
My Goal: Having direct links creates a big security problem for me, since the documents/images are supposed to be private data. What I would prefer to do is validate a user's credentials when the link is clicked, then load the file in the browser using a more generic url path.
--Example--
"mysite.com/attachments/1" ---> (Image)
--instead of--
"mysite.com/data/files/importantImg.jpg"
Where I'm At: Not very far. My first thought was to add a page that sends the server request and receives a file byte stream along with mime type that I can reassemble and present to the user. However, I have no idea if this is possible using a web service that sends JSON requests, nor do I have a clue about how the reassembling process would work client-side.
Like I said, I'll take any and all advice. I'd love to learn more about this subject for future projects as well, but for now I just need to be pointed in the right direction.
Your first thought is correct, for it, you need to use the Response object, and more specifically the AddHeader and Write functions. Of course this will be a different page that will only handle file downloads, so it will be perfectly fine in your JSON web service.
I don't think you want to do this with a web service. Just use a regular IHttpHandler to perform the validation and return the data. So you would have the URL "attachments/1" get rewritten to "attachments/download.ashx?id=1". When you've verified access, write the data to the response stream. You can use the Content Disposition header to set the file name.
I want to grab a set of data from a site into my C# application. I've referred to some sites and articles using the WebClient class.
But the problem is the data I want is in a news bar made using flash. Is it possible to grab the data from it? The data in it also keeps on updating as well.
Have you tried the Yahoo approach? The below project does just that.
It is easy to download stock data from Yahoo!. For example, copy and
paste this URL into your browser address:
http://download.finance.yahoo.com/d/quotes.csv?s=YHOO+GOOG+MSFT&f=sl1d1t1c1hgvbap2.
Depending on your Internet browser setting, you may be asked to save
the results into a filename called "quotes.csv" or the following will
appear in your browser:
http://www.codeproject.com/KB/aspnet/StockQuote.aspx?display=Normal
It is unable to grab a data from Flash.
One possible solution is that, if you dig into embed tag at the Flash object or find some url or rss that looks to be consumed by the flash, you can read that by WebClient or (hopefully) XmlReader.