.Net Core Web Api 上傳女朋友的照片到微軟雲Azure Storage
阿新 • • 發佈:2018-11-02
前言
實現一個Web Api,把女朋友照片儲存到Azure雲的storage裡。
Image Upload Api
在對應的Api Controller裡,加上attribute:
[Consumes("application/json", "multipart/form-data")]
然後定義一個model,用來接收上傳的圖片:
/// <summary> /// Image model /// </summary> public class UploadImage { /// <summary> /// imageFile /// </summary> public IFormFile imageFile { get; set; } }
實現對應的Api,處理客戶端上傳圖片的請求:
/// <summary> /// UploadImage /// </summary> /// <param name="imageData"></param> /// <returns></returns> [HttpPost] [Route("imageupload")] public async Task<IActionResult> UploadImage([FromForm]UploadImage imageData) { var stream = imageData.imageFile.OpenReadStream(); var name = imageData.imageFile.FileName; var uploadResult = await UploadFileAsBlob(stream, name); return Ok(name); }
建立Storage
在Azure雲服務建立相應的Storage,並在對應的Storage下建一個Blob,最後在Blob裡建立一個Container,在storage的Access keys裡,儲存connection string,這個是服務端連線storage的credential key。
因為現在的雲服務都是圖形化操作,這裡不再詳述,在Portal都有對應的操作。
儲存圖片在Blob中
引用兩個namespace:
using Microsoft.WindowsAzure.Storage; using Microsoft.WindowsAzure.Storage.Blob;
連線Azure storage:
/// <summary>
/// Save image to Azure blob
/// </summary>
/// <param name="stream"></param>
/// <param name="filename"></param>
/// <returns></returns>
public async Task<string> UploadFileAsBlob(Stream stream, string filename)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse("StorageAccountConnectionString");
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve a reference to a container.
CloudBlobContainer container = blobClient.GetContainerReference("BlobContainerName");
CloudBlockBlob blockBlob = container.GetBlockBlobReference(filename);
await blockBlob.UploadFromStreamAsync(stream);
stream.Dispose();
return blockBlob?.Uri.ToString();
}
Postman上傳效果
選擇Body,在body裡選擇form-data,然後把key設定成model裡的變數名稱:
最後儲存在Azure的storage中,
在瀏覽器位址列輸入storage 的地址+ 照片名稱,把女朋友的照片下載到本地。