Use httr to download file

Note that, if you omit the -Credential parameter, PowerShell will not prompt you for a user name and password and will throw this error:. You have to at least pass the user name with the -Credential parameter. PowerShell will then ask for the password. If you want to avoid a dialog window in your script, you can store the credentials in a PSCredential object:.

You can use the -UseDefaultCredentials parameter instead of the -Credential parameter if you want to use the credentials of the current user. To add a little extra security, you might want to encrypt the password. If the web server uses basic authentication, your password will be transmitted in clear text if you download via HTTP. Note that this method only works if the web server manages authentication. Nowadays, most websites use the features of a content management system CMS to authenticate users.

Usually, you then have to fill out an HTML form. I will explain in one of my next posts how you can do this with Invoke-WebRequest. However, third-party PowerShell modules exist that step into the breach. Join the 4sysops PowerShell group!

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However the uri changes every month, so I was wondering if the uri destination value can be set based on a value in a reference file as opposed to hard coding it, if so how? Is the date on the website? Will take some coding. Great tips, can you tell me how you would apply this same concept in powershell to download all files from a web folder? Thank you in advance. Im not sure whether this is possible.

You would somehow need to enumerate the content of the folder and then download it. That is normally forbidden by webservers.

Then you could parse the output and ask for specific files to be downloaded or all of them. But I dont see any straight-forward way.

This works fine but I cannot step through this content. When I put this content through a foreach loop it dumps every line at once. If I save it to a file then I can use System. Putting a file on your web server and linking to it from an HTML page is just the first step. You also need to be aware of the HTTP response headers that affect file downloads.

A dialog is displayed allowing the user to save the file locally:. The trouble is that the browser behaves differently if the file is something that it can display itself. The header also allows you to control the default file name. For static content you can manually configure the additional header in your web server. Sign in to your account. The text was updated successfully, but these errors were encountered:. I don't see any obvious way to enable this.

Perhaps request functions could also be parameterised by their output type. By default, data would be stored in R, but alternatively you could request that it be saved to disk. But maybe this is outside of the scope of httr. Sorry, something went wrong. I'd love to have this functionality as well. The functionality here will allow for users to stream the collection of their web analytics data being captured by Adobe Analytics AA is a competitor to Google Analytics directly via API, rather than wait for it to be collected and processed by Adobe.

I'm not sure R is really the right tool for this operations type use case, but I've already written a lot of functionality against their REST API, so it seems natural to extend my package to include this as well. Well, an easier way of doing this would just be using, say, the downloader package, which does what it says on the tin.

Personally I'm not seeing the argument for this to be built into httr - again, there are other libraries that handle it perfectly happily.