Use the presigned URL to upload an object.
curl
curl -SO "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************"
Java
import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class Demo {
public static void main(String[] args) {
// Specify the presigned URL that allows HTTP GET requests.
String fileURL = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************";
// Specify the path in which the downloaded object is stored, including the object name and extension.
String savePath = "C:/downloads/myfile.txt";
try {
downloadFile(fileURL, savePath);
System.out.println("Download completed!");
} catch (IOException e) {
System.err.println("Error during download: " + e.getMessage());
}
}
private static void downloadFile(String fileURL, String savePath) throws IOException {
URL url = new URL(fileURL);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
httpConn.setRequestMethod("GET");
// Specify the response code.
int responseCode = httpConn.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
// Configure the input stream.
InputStream inputStream = new BufferedInputStream(httpConn.getInputStream());
// Configure the output stream.
FileOutputStream outputStream = new FileOutputStream(savePath);
byte[] buffer=new byte[4096]; // Specify the size of the buffer.
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();
} else {
System.out.println("No file to download. Server replied HTTP code: " + responseCode);
}
httpConn.disconnect();
}
}
Node.js
const https = require('https');
const fs = require('fs');
const fileURL = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************";
const savePath = "C:/downloads/myfile.txt";
https.get(fileURL, (response) => {
if (response.statusCode === 200) {
const fileStream = fs.createWriteStream(savePath);
response.pipe(fileStream);
fileStream.on('finish', () => {
fileStream.close();
console.log("Download completed!");
});
} else {
console.error(`Download failed. Server responded with code: ${response.statusCode}`);
}
}).on('error', (err) => {
console.error("Error during download:", err.message);
});
Python
import requests
file_url = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************"
save_path = "C:/downloads/myfile.txt"
try:
response = requests.get(file_url, stream=True)
if response.status_code == 200:
with open(save_path, 'wb') as f:
for chunk in response.iter_content(4096):
f.write(chunk)
print("Download completed!")
else:
print(f"No file to download. Server replied HTTP code: {response.status_code}")
except Exception as e:
print("Error during download:", e)
Go
package main
import (
"io"
"net/http"
"os"
)
func main() {
fileURL := "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************"
savePath := "C:/downloads/myfile.txt"
response, err := http.Get(fileURL)
if err != nil {
panic(err)
}
defer response.Body.Close()
if response.StatusCode == http.StatusOK {
outFile, err := os.Create(savePath)
if err != nil {
panic(err)
}
defer outFile.Close()
_, err = io.Copy(outFile, response.Body)
if err != nil {
panic(err)
}
println("Download completed!")
} else {
println("No file to download. Server replied HTTP code:", response.StatusCode)
}
}
JavaScript
const fileURL = "https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************";
const savePath = "C:/downloads/myfile.txt"; // Specify the name of the downloaded object.
fetch(fileURL)
.then(response => {
if (!response.ok) {
throw new Error(`Server replied HTTP code: ${response.status}`);
}
return response.blob(); // Change the type of the response to blob.
})
.then(blob => {
const link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download=savePath; // Specify the name of the downloaded object.
document.body.appendChild(link); // This step ensures that the link exists in the document.
link.click(); // Click the link to simulate the download.
link.remove(); // Remove the link after the object is downloaded.
console.log("Download completed!");
})
.catch(error => {
console.error("Error during download:", error);
});
Android-Java
import android.os.AsyncTask;
import android.os.Environment;
import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class DownloadTask extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
String fileURL = params[0];
String savePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/myfile.txt"; // Specify the path in which you want to store the downloaded object.
try {
URL url = new URL(fileURL);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
httpConn.setRequestMethod("GET");
int responseCode = httpConn.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream inputStream = new BufferedInputStream(httpConn.getInputStream());
FileOutputStream outputStream = new FileOutputStream(savePath);
byte[] buffer = new byte[4096];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.close();
inputStream.close();
return "Download completed!";
} else {
return "No file to download. Server replied HTTP code: " + responseCode;
}
} catch (Exception e) {
return "Error during download: " + e.getMessage();
}
}
}
Objective-C
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
// Specify the presigned URL and the path in which you want to store the object.
NSString *fileURL = @"https://examplebucket.oss-cn-hangzhou.aliyuncs.com/exampleobject.txt?x-oss-date=20241112T092756Z&x-oss-expires=3599&x-oss-signature-version=OSS4-HMAC-SHA256&x-oss-credential=LTAI****************/20241112/cn-hangzhou/oss/aliyun_v4_request&x-oss-signature=ed5a******************************************************";
NSString *savePath = @"/Users/your_username/Desktop/myfile.txt"; // Replace your_username with your actual username.
// Create a URL object.
NSURL *url = [NSURL URLWithString:fileURL];
// Create an object download task.
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// Handle errors.
if (error) {
NSLog(@"Error during download: %@", error.localizedDescription);
return;
}
// Check the data of the object.
if (!data) {
NSLog(@"No data received.");
return;
}
// Save the object.
NSError *writeError = nil;
BOOL success = [data writeToURL:[NSURL fileURLWithPath:savePath] options:NSDataWritingAtomic error:&writeError];
if (success) {
NSLog(@"Download completed!");
} else {
NSLog(@"Error saving file: %@", writeError.localizedDescription);
}
}];
// Start the object download task.
[task resume];
// Continue to run the main thread to complete the asynchronous request.
[[NSRunLoop currentRunLoop] run];
}
return 0;
}
