Perl

Download File from Dropbox

See more Dropbox Examples

Downloads a file from Dropbox. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# A Dropbox access token should have been previously obtained.
# Dropbox access tokens do not expire.
# See Dropbox Access Token.

my $rest = Chilkat2::Rest->new;

# Connect to Dropbox
my $success = $rest->Connect('content.dropboxapi.com', 443, 1, 1);
if (!$success) {
    print $rest->LastErrorText, "\n";
    exit;
}

# Add request headers.
$rest->AddHeader('Authorization', 'Bearer DROPBOX_ACCESS_TOKEN');

# The download "parameters" are contained in JSON passed in an HTTP request header.
# This is the JSON indicating the file to be downloaded:
# {
#    "path": "/Homework/lit/hamlet.xml",
# }

my $json = Chilkat2::JsonObject->new;
$json->AppendString('path', '/Homework/lit/hamlet.xml');
$rest->AddHeader('Dropbox-API-Arg', $json->Emit());

my $bd = Chilkat2::BinData->new;
$success = $rest->FullRequestNoBodyBd('POST', '/2/files/download', $bd);
if (!$success) {
    print $rest->LastErrorText, "\n";
    exit;
}

# When successful, Dropbox responds with a 200 response code.
if ($rest->ResponseStatusCode != 200) {
    # Examine the request/response to see what happened.
    print 'response status code = ', $rest->ResponseStatusCode, "\n";
    print 'response status text = ', $rest->ResponseStatusText, "\n";
    print 'response header: ', $rest->ResponseHeader, "\n";
    print 'response body (if any): ', $bd->GetString('utf-8'), "\n";
    print "---\n";
    print 'LastRequestStartLine: ', $rest->LastRequestStartLine, "\n";
    print 'LastRequestHeader: ', $rest->LastRequestHeader, "\n";
    exit;
}

# The file was downloaded into bd.
# Save it to the filesystem.
$success = $bd->WriteFile('c:/temp/qa_output/hamlet.xml');

# Information about the downloaded file is also available as JSON in a response header.
# The "dropbox-api-result" response header contains the information.  For example:
my $apiResult = $rest->ResponseHdrByName('dropbox-api-result');
print $apiResult, "\n";

# In this case, the pretty-formatted dropbox-api-result JSON looks like this:
# {
#   "name": "hamlet.xml",
#   "path_lower": "/homework/lit/hamlet.xml",
#   "path_display": "/Homework/lit/hamlet.xml",
#   "id": "id:74FkdeNuyKAAAAAAAAAAAQ",
#   "client_modified": "2016-06-02T23:19:00Z",
#   "server_modified": "2016-06-02T23:19:00Z",
#   "rev": "9482db15f",
#   "size": 279658
# }

# Load the JSON, pretty-print it, and demonstrate how to get some values...
my $jsonResult = Chilkat2::JsonObject->new;
$jsonResult->EmitCompact(0);
$jsonResult->Load($apiResult);
# Show the JSON pretty-printed...
print $jsonResult->Emit(), "\n";

# Sample code to get data from the JSON response:
my $size = $jsonResult->IntOf('size');
print 'size = ', $size, "\n";

my $rev = $jsonResult->StringOf('rev');
print 'rev = ', $rev, "\n";

my $clientModified = $jsonResult->StringOf('client_modified');
my $ckdt = Chilkat2::DateTime->new;
$ckdt->SetFromTimestamp($clientModified);
my $bLocalTime = 1;
my $dt = Chilkat2::DtObj->new;
$ckdt->ToDtObj($bLocalTime, $dt);

print $dt->Day, '/', $dt->Month, '/', $dt->Year, ' ', $dt->Hour, ':', $dt->Minute, "\n";