Api to download file

The server side app is an ASP. When an application needs to talk to another system, it is quite common that the application sends data to and receives data from the other system using HttpClient in the back-end. This blog post intends to provide the missing guide. The complete source code is in my GitHub repository.

The implementation is lengthy, but the code logic demonstrates several checks to meet the security criteria. The following code snippet shows the example action method. In the code above, lines 22 to 47 handle the File Disposition, and lines 48 to 65 handle the Form Disposition. When the MultipartReader reads sections in the HTTP request body, the request content is parsed and saved to physical disk file and memory form data. This API action method finds the file and converts the file to an array of bytes, then returns a FileContentResult with the byte array and metadata.

The following code snippet shows an example. The following code snippet shows an example solution. This field contains zero or more interesting links about the graph subject. These links may be invoked to obtain additional relationships or more detailed information about this graph subject.

The descriptor is the primary way to reference the graph subject while the system is running. This field will uniquely identify the same graph subject across both Accounts and Organizations.

This is the non-unique display name of the graph subject. To change this field, you must alter its value in the source provider. Deprecated - Can be inferred from the subject type of the descriptor Descriptor. The readonly view of the links. Because Reference links are readonly, we only want to expose them as read only. Return the specified item and its direct children, as well as recursive chains of nested child folders that only contain a single folder.

Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Skip to main content. With the groundwork laid, we can easily write an action method as follows:.

In the code above, we first find or generate the requested file from the local file system or a file storage, then read the file content. In the end line 7 , we return a FileContentResult object that is created using the method File byte[] fileContents, string contentType, string fileDownloadName.

Note that we should validate the request and user permissions before finding or generating the requested file. And you can choose to stream the file too. In the File method line 7 , the second parameter contentType is used in the HTTP header to indicate the format of contents transmitted over the internet.

You can set the value for contentType according to your file type. In the File method, the third parameter fileDownloadName determines the value for the filename attribute in the content-disposition HTTP response header. Browsers treat this value as the top priority to dictate the filename when downloading the file.

In the responses section, the Swagger UI provides a link for downloading the returned file. Sometimes, the file type should be determined at runtime. Then in this case, we should set the contentType based on the file extension. NET Core natively supports this kind of translation.

I tried this pathFile on the explorateur windows and it's works fine. Improve this question. Dan W 5, 4 4 gold badges 31 31 silver badges 44 44 bronze badges. I'd suggest you mask the private informations you're giving out Directory, employer name, etc Thanks Vincz for the advice and Dan W for the modification.

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