b2_get_download_authorization

Code

BUCKET_ID=... # The ID of the bucket you want to authorize
FILE_NAME_PREFIX=... # The file name prefix of files the download authorization will allow
VALID_DURATION=... # The number of seconds the authorization is valid for
ACCOUNT_AUTHORIZATION_TOKEN = "" # Provided by b2_authorize_account

curl -H 'Authorization: $ACCOUNT_AUTHORIZATION_TOKEN' \
     -D '{"bucketId":"$BUCKET_ID","fileNamePrefix":"$FILE_NAME_PREFIX","validDurationInSeconds":$VALID_DURATION}' \
     https://apiNNN.backblazeb2.com/b2api/v2/b2_get_download_authorization

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

import java.io.*;
import java.util.*;
import javax.json.*;
import java.net.HttpURLConnection;
import java.net.URL;

String apiUrl = ""; // Provided by b2_authorize_account
String bucketId = ""; // The bucket that files can be downloaded from
String fileNamePrefix = "" ; // The file name prefix of files the download authorization will allow
int validDuration = 86400; // The number of seconds the authorization is valid for
String accountAuthorizationToken = ""; // Provided by b2_authorize_account
HttpURLConnection connection = null;
String postParams = "{\"bucketId\":\"" + bucketId + "\", \"fileNamePrefix\":\"" + fileNamePrefix + "\", \"validDurationInSeconds\":"+ validDuration +"}";
byte postData[] = postParams.getBytes(StandardCharsets.UTF_8);
try {
    URL url = new URL(apiUrl + "/b2api/v2/b2_get_download_authorization");
    connection = (HttpURLConnection)url.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Authorization", accountAuthorizationToken);
    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    connection.setRequestProperty("charset", "utf-8");
    connection.setRequestProperty("Content-Length", Integer.toString(postData.length));
    connection.setDoOutput(true);
    DataOutputStream writer = new DataOutputStream(connection.getOutputStream());
    writer.write(postData);
    String jsonResponse = myInputStreamReader(connection.getInputStream());
    System.out.println(jsonResponse);
} catch (Exception e) {
    e.printStackTrace();
} finally {
    connection.disconnect();
}

static public String myInputStreamReader(InputStream in) throws IOException {
    InputStreamReader reader = new InputStreamReader(in);
    StringBuilder sb = new StringBuilder();
    int c = reader.read();
    while (c != -1) {
        sb.append((char)c);
        c = reader.read();
    }
    reader.close();
    return sb.toString();
}

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

import json
import urllib2

api_url = "" # Provided by b2_authorize_account
bucket_id = "" # The bucket that files can be downloaded from
file_name_prefix = "" # The file name prefix of files the download authorization will allow
valid_duration = 86400 # The number of seconds the authorization is valid for
account_authorization_token = "" # Provided by b2_authorize_account
request = urllib2.Request(
    '%s/b2api/v2/b2_get_download_authorization' % api_url,
    json.dumps({ 'bucketId' : bucket_id, 'fileNamePrefix' : file_name_prefix, 'validDurationInSeconds' : valid_duration}),
    headers = { 'Authorization': account_authorization_token }
    )
response = urllib2.urlopen(request)
response_data = json.loads(response.read())
response.close()

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

import Foundation

let apiUrl = "" // Provided by b2_authorize_account
let bucketId = "" // The bucket that files can be downloaded from
let fileNamePrefix = "" // The file name prefix of files the download authorization will allow
let validDuration = 86400 // The number of seconds the authorization is valid for
let accountAuthorizationToken = "" // Provided by b2_authorize_account

// Create the request
var request = URLRequest(url: URL(string: "\(apiUrl)/b2api/v2/b2_get_download_authorization")!)
request.httpMethod = "POST"
request.addValue(accountAuthorizationToken, forHTTPHeaderField: "Authorization")
request.httpBody = "{\"bucketId\":\"\(bucketId)\", \"fileNamePrefix\":\"\(fileNamePrefix)\", \"validDurationInSeconds\":\(validDuration)}".data(using: .utf8)!

// Create the task
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
	if let data = data {
		let json = String(data: data, encoding: .utf8)
		print("\(json!)")
	}
}

task.resume()

// Swift 4.1 (swiftlang-902.0.48 clang-902.0.37.1) Xcode 9.3.1 (9E501)

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

require 'json'
require 'net/http'

api_url = "" # Provided by b2_authorize_account
bucket_id = "" # The bucket that files can be downloaded from
file_name_prefix = "" # The file name prefix of files the download authorization will allow
valid_duration = 86400 # The number of seconds the authorization is valid for
account_authorization_token = "" # Provided by b2_authorize_account
uri = URI.join("#{api_url}/b2api/v2/b2_get_download_authorization")
req = Net::HTTP::Post.new(uri)
req.add_field("Authorization","#{account_authorization_token}")
req.body = "{\"bucketId\":\"#{bucket_id}\", \"fileNamePrefix\":\"#{file_name_prefix}\", \"validDurationInSeconds\":#{valid_duration}}"
http = Net::HTTP.new(req.uri.host, req.uri.port)
http.use_ssl = true
res = http.start {|http| http.request(req)}
case res
when Net::HTTPSuccess then
    res.body
when Net::HTTPRedirection then
    fetch(res['location'], limit - 1)
else
    res.error!
end

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

String apiUrl = "API_URL"; // Provided by b2_authorize_account 
String accountAuthorizationToken = "ACCOUNT_AUTHORIZATION_TOKEN"; // Provided by b2_authorize_account 
String bucketId = "BUCKET_ID"; // The bucket that files can be downloaded from
String fileNamePrefix = "FILE_NAME_PREFIX"; // The file name prefix of files the download authorization will allow
int validDuration = 86400; // The number of seconds the authorization is valid for

HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(apiUrl + "/b2api/v2/b2_get_file_info");
string body = "{\"bucketId\":\"" + bucketId + "\", \"fileNamePrefix\":\"" + fileNamePrefix + "\", \"validDurationInSeconds\":" + validDuration + "}";
var data = Encoding.UTF8.GetBytes(body);
webRequest.Method = "POST";
webRequest.Headers.Add("Authorization", accountAuthorizationToken);
webRequest.ContentType = "application/json; charset=utf-8";
webRequest.ContentLength = data.Length;
using (var stream = webRequest.GetRequestStream())
{
	stream.Write(data, 0, data.Length);
	stream.Close();
}
WebResponse response = (HttpWebResponse)webRequest.GetResponse();
var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
response.Close();
Console.WriteLine(responseString);

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}

Code

$api_url = ""; // From b2_authorize_account call
$auth_token = ""; // From b2_authorize_account call
$bucket_id = ""; // The bucket that files can be downloaded from
$valid_duration = 86400; // The number of seconds the authorization is valid for
$file_name_prefix = ""; // The file name prefix of files the download authorization will allow

$session = curl_init($api_url .  "/b2api/v2/b2_get_download_authorization");

// Add post fields
$data = array("bucketId" => $bucket_id, 
              "validDurationInSeconds" => $valid_duration, 
              "fileNamePrefix" => $file_name_prefix);
$post_fields = json_encode($data);
curl_setopt($session, CURLOPT_POSTFIELDS, $post_fields); 

// Add headers
$headers = array();
$headers[] = "Authorization: " . $auth_token;
curl_setopt($session, CURLOPT_HTTPHEADER, $headers); 

curl_setopt($session, CURLOPT_POST, true); // HTTP POST
curl_setopt($session, CURLOPT_RETURNTRANSFER, true);  // Receive server response
$server_output = curl_exec($session); // Let's do this!
curl_close ($session); // Clean up
echo ($server_output); // Tell me about the rabbits, George!

Output

{
  "authorizationToken": "3_20160803004041_53982a92f631a8c7303e3266_d940c7f5ee17cd1de3758aaacf1024188bc0cd0b_000_20160804004041_0006_dnld",
  "bucketId": "a71f544e781e6891531b001a",
  "fileNamePrefix": "public"
}