Java Language
FileUpload AWS को

परिचय

फाइल को s3 बकेट में अपलोड करें

यहां हम एक बाकी एपीआई बनाएंगे, जो फ़ाइल ऑब्जेक्ट को फ्रंट एंड से मल्टीपार्ट पैरामीटर के रूप में लेगा और इसे जावा बाकी एपीआई का उपयोग करके एस 3 बाल्टी में अपलोड करेगा।

आवश्यकता : - s3 बाल्टी के लिए कुंजी और पहुंच कुंजी को सुरक्षित रखें जहां आप अपनी फ़ाइल अपलोड करना चाहते हैं।

कोड: - DocumentController.java

@RestController
@RequestMapping("/api/v2")
public class DocumentController {

    private static String bucketName = "pharmerz-chat";
    //   private static String keyName        = "Pharmerz"+ UUID.randomUUID();

    @RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA)
    public URL uploadFileHandler(@RequestParam("name") String name,
                                 @RequestParam("file") MultipartFile file) throws IOException {

/******* Printing all the possible parameter from @RequestParam *************/

        System.out.println("*****************************");

        System.out.println("file.getOriginalFilename() " + file.getOriginalFilename());
        System.out.println("file.getContentType()" + file.getContentType());
        System.out.println("file.getInputStream() " + file.getInputStream());
        System.out.println("file.toString() " + file.toString());
        System.out.println("file.getSize() " + file.getSize());
        System.out.println("name " + name);
        System.out.println("file.getBytes() " + file.getBytes());
        System.out.println("file.hashCode() " + file.hashCode());
        System.out.println("file.getClass() " + file.getClass());
        System.out.println("file.isEmpty() " + file.isEmpty());

        /*************Parameters to b pass to s3 bucket put Object **************/
        InputStream is = file.getInputStream();
        String keyName = file.getOriginalFilename();


// Credentials for Aws  
        AWSCredentials credentials = new BasicAWSCredentials("AKIA*************", "zr**********************");

        /****************** DocumentController.uploadfile(credentials); ***************************/


        AmazonS3 s3client = new AmazonS3Client(credentials);
        try {
            System.out.println("Uploading a new object to S3 from a file\n");
            //File file = new File(awsuploadfile);
            s3client.putObject(new PutObjectRequest(
                    bucketName, keyName, is, new ObjectMetadata()));


            URL url = s3client.generatePresignedUrl(bucketName, keyName, Date.from(Instant.now().plus(5, ChronoUnit.MINUTES)));
            // URL url=s3client.generatePresignedUrl(bucketName,keyName, Date.from(Instant.now().plus(5, ChronoUnit.)));
            System.out.println("************************************");
            System.out.println(url);

            return url;

        } catch (AmazonServiceException ase) {
            System.out.println("Caught an AmazonServiceException, which " +
                    "means your request made it " +
                    "to Amazon S3, but was rejected with an error response" +
                    " for some reason.");
            System.out.println("Error Message:    " + ase.getMessage());
            System.out.println("HTTP Status Code: " + ase.getStatusCode());
            System.out.println("AWS Error Code:   " + ase.getErrorCode());
            System.out.println("Error Type:       " + ase.getErrorType());
            System.out.println("Request ID:       " + ase.getRequestId());
        } catch (AmazonClientException ace) {
            System.out.println("Caught an AmazonClientException, which " +
                    "means the client encountered " +
                    "an internal error while trying to " +
                    "communicate with S3, " +
                    "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }

        return null;

    }


}

फ्रंट एंड फंक्शन

var form = new FormData();
form.append("file", "image.jpeg");

var settings = {
 "async": true,
 "crossDomain": true,
 "url": "http://url/",
 "method": "POST",
 "headers": {
   "cache-control": "no-cache"
 },
 "processData": false,
 "contentType": false,
 "mimeType": "multipart/form-data",
 "data": form
}

$.ajax(settings).done(function (response) {
 console.log(response);
});