Semblable à Simple example to upload photos into google picasa, qui est à propos de python; celui-ci concerne .NET.Comment puis-je télécharger une photo sur Picasa via les API GData, à partir de .NET?
Comment use the ClientLogin protocol, puis comment do the multipart/related form POST, comme requis par Google?
Apparemment, il existe une bibliothèque de classes qui est empaquetée pour cela. Ce que je voulais vraiment c'était le protocole HTTP requis pour le faire. En utilisant le Google API documentation for Picasa, c'est ce que j'ai compris.
Une demande ressemble à ceci:
POST https://picasaweb.google.com/data/feed/api/user/default/albumid/default HTTP/1.1
GData-Version: 2.0
Authorization: GoogleLogin auth=DQAAAJgAAAD_....-tTM2ZliWDzXLA
Content-Type: multipart/related; boundary="1292107594356"
Host: picasaweb.google.com
Content-Length: 5415
Expect: 100-continue
Media multipart posting
--1292107594356
Content-Type: application/atom+xml
<entry xmlns='http://www.w3.org/2005/Atom'>
<title>DesiredFileNameOnGoogle.jpg</title>
<summary>uploaded from PicasaUpload</summary>
<category scheme='http://schemas.google.com/g/2005#kind'
term='http://schemas.google.com/photos/2007#photo'/>
</entry>
--1292107594356
Content-Type: image/jpeg
(binary content here)
--1292107594356--
Une réponse ressemble à ceci:
HTTP/1.1 201 Created
Expires: Sat, 11 Dec 2010 22:46:26 GMT
Date: Sat, 11 Dec 2010 22:46:26 GMT
Cache-Control: private, max-age=0, must-revalidate, no-transform
Set-Cookie: _rtok=y6u5yQV84QUO; Path=/; Secure; HttpOnly
Set-Cookie: S=photos_html=lIi6RQVuq7F1iAQHMpMkUA; Domain=.google.com; Path=/; Secure; HttpOnly
Content-Type: application/atom+xml; charset=UTF-8; type=entry
Vary: Accept, X-GData-Authorization, GData-Version
GData-Version: 2.0
ETag: "YD0qeyI."
Location: https://picasaweb.google.com/data/entry/api/user/1018683/albumid/55399652081/photoid/5549567010?authkey=Gv1sRgCJrQ5qeYxISo5gE
Content-Location: https://picasaweb.google.com/data/entry/api/user/1018683/albumid/55399652081/photoid/5549567010?authkey=Gv1sRgCJrQ5qeYxISo5gE
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Transfer-Encoding: chunked
Et la charge utile Atom dans la réponse est comme ceci:
<?xml version='1.0' encoding='UTF-8'?>
<entry xmlns='http://www.w3.org/2005/Atom' xmlns:exif='http://schemas.google.com/photos/exif/2007' xmlns:app='http://www.w3.org/2007/app' xmlns:gphoto='http://schemas.google.com/photos/2007' xmlns:media='http://search.yahoo.com/mrss/' xmlns:gd='http://schemas.google.com/g/2005' gd:etag='"YD0qeyI."'>
<id>https://picasaweb.google.com/data/entry/user/1018683/albumid/5549217276399652081/photoid/5549498718938958882</id>
<published>2010-12-11T18:49:18.000Z</published>
<updated>2010-12-11T18:49:18.319Z</updated>
<app:edited>2010-12-11T18:49:18.319Z</app:edited>
<category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/photos/2007#photo'/>
<title>CropperCapture[30].jpg</title>
<summary>woof!</summary>
<content type='image/jpeg' src='https://lh5.googleusercontent.com/_-Mw_MhEEB_U/TQPHrq_XjCI/AAAAAAAAABQ/wu5AI7QfmWQ/CropperCapture%5B30%5D.jpg'/>
<link rel='http://schemas.google.com/g/2005#feed' type='application/atom+xml' href='https://picasaweb.google.com/data/feed/api/user/1018683/albumid/5549217276399652081/photoid/5549498718938958882?authkey=Gv1sRgCJrQ5qeYxISo5gE'/>
<link rel='alternate' type='text/html' href='http://picasaweb.google.com/1018683/DropBox?authkey=Gv1sRgCJrQ5qeYxISo5gE#5549498718938958882'/>
<link rel='http://schemas.google.com/photos/2007#canonical' type='text/html' href='http://picasaweb.google.com/lh/photo/lzJ9Ya6NeZM8sPeVfFcn98QJQ0GDj3dCNP33YlpCH6E'/>
<link rel='self' type='application/atom+xml' href='https://picasaweb.google.com/data/entry/api/user/1018683/albumid/5549217276399652081/photoid/5549498718938958882?authkey=Gv1sRgCJrQ5qeYxISo5gE'/>
<link rel='edit' type='application/atom+xml' href='https://picasaweb.google.com/data/entry/api/user/1018683/albumid/5549217276399652081/photoid/5549498718938958882?authkey=Gv1sRgCJrQ5qeYxISo5gE'/>
<link rel='edit-media' type='image/jpeg' href='https://picasaweb.google.com/data/media/api/user/1018683/albumid/5549217276399652081/photoid/5549498718938958882?authkey=Gv1sRgCJrQ5qeYxISo5gE'/>
<link rel='http://schemas.google.com/photos/2007#report' type='text/html' href='http://picasaweb.google.com/lh/reportAbuse?uname=1018683&aid=5549217276399652081&iid=5549498718938958882'/>
<gphoto:id>5549498718938958882</gphoto:id>
<gphoto:albumid>5549217276399652081</gphoto:albumid>
<gphoto:access>private</gphoto:access>
<gphoto:width>441</gphoto:width>
<gphoto:height>287</gphoto:height>
<gphoto:size>26876</gphoto:size>
<gphoto:checksum/>
<gphoto:timestamp>1292093358000</gphoto:timestamp>
<gphoto:imageVersion>20</gphoto:imageVersion>
<gphoto:commentingEnabled>true</gphoto:commentingEnabled>
<gphoto:commentCount>0</gphoto:commentCount>
<gphoto:license id='0' name='All Rights Reserved' url=''>ALL_RIGHTS_RESERVED</gphoto:license>
<exif:tags>
<exif:imageUniqueID>abfde2a4ab9f9e177865ba4fd50e7edb</exif:imageUniqueID>
</exif:tags>
<media:group>
<media:content url='https://lh5.googleusercontent.com/_-Mw_MhEEB_U/TQPHrq_XjCI/AAAAAAAAABQ/wu5AI7QfmWQ/CropperCapture%5B30%5D.jpg' height='287' width='441' type='image/jpeg' medium='image'/>
<media:credit>User Name</media:credit>
<media:description type='plain'>woof!</media:description>
<media:keywords/>
<media:thumbnail url='https://lh5.googleusercontent.com/_-Mw_MhEEB_U/TQPHrq_XjCI/AAAAAAAAABQ/wu5AI7QfmWQ/s72/CropperCapture%5B30%5D.jpg' height='47' width='72'/>
<media:thumbnail url='https://lh5.googleusercontent.com/_-Mw_MhEEB_U/TQPHrq_XjCI/AAAAAAAAABQ/wu5AI7QfmWQ/s144/CropperCapture%5B30%5D.jpg' height='94' width='144'/>
<media:thumbnail url='https://lh5.googleusercontent.com/_-Mw_MhEEB_U/TQPHrq_XjCI/AAAAAAAAABQ/wu5AI7QfmWQ/s288/CropperCapture%5B30%5D.jpg' height='188' width='288'/>
<media:title type='plain'>CropperCapture[30].jpg</media:title>
</media:group>
</entry>
Essayez cet échantillon de code qui fonctionne pour moi j'espère travailler avec vous
GAuthSubRequestFactory authFactory = new GAuthSubRequestFactory("lh2", "Your application name");
authFactory.Token = (string)HttpContext.Current.Session["token"];
PicasaService picasaService= new PicasaService(authFactory.ApplicationName);
service.RequestFactory = authFactory;
Uri postUri = new Uri(PicasaQuery.CreatePicasaUri(Constants.CurrentUser, albumId));
System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath);
System.IO.FileStream fileStream = fileInfo.OpenRead();
PicasaEntry entry = (PicasaEntry)picasaService.Insert(postUri, fileStream, "image/jpeg", filePath);
fileStream.Close();