[教程][Blogger][C#] Blogger API v3 教程#7——获取帖子列表
12 Oct 2013
Comments
【这个系列中..】
[教程][Blogger][C#] Blogger API v3教程#1 ——
前言
[教程][Blogger][C#] Blogger API v3 教程#2 —— 申请 Blogger API
的使用权限
[教程][Blogger][C#] Blogger API v3 教程#3 —— 获取API Key、Client ID
和 Client
Secret
[教程][Blogger][C#] Blogger API v3 教程#4 ——
设置开发环境、安装插件、添加Reference
[教程][Blogger][C#] Blogger API v3 教程#5 —— 获取Blog
Id
[教程][Blogger][C#] Blogger API v3 教程#6——OAuth 2.0
认证
[教程][Blogger][C#] Blogger API v3
教程#7——获取帖子列表
[教程][Blogger][C#] Blogger API v3
教程#8——更改帖子标题
【获取帖子列表】
有BlogID 了万事好办..
Blogger API的数据模型是这样的：
Blogs Resource 下有Posts Resource
所以我们创建一个PostsResource变量，传入blogService
PostsResource postsRes = new PostsResource(blogService);有一API 叫做 posts.list
如上面的GetByUrl Request 一般，PostsResource 也有ListRequest
呼叫PostsResouce 里面的 .List函数，返回一个PostsResource.ListRequest
然后呼叫PostsResource.ListRequest 的.Execute()函数，返回一个PostList 类型
PostsResource postsRes = new PostsResource(blogService);
PostsResource.ListRequest postsListReq = postsRes.List(blog.Id);
PostList posts = postsListReq.Execute();Blogger API 默认返回10个posts，储存在Post.Items中
现在在遍历.Items 然后输出post的 Title
for (int i = 0; i < posts.Items.Count; i++)
{
Console.WriteLine(posts.Items[i].Title);
}完整代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Google.Apis.Blogger.v3;
using Google.Apis.Blogger.v3.Data;
using Google.Apis.Services;
using System.Diagnostics;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using DotNetOpenAuth.OAuth2;
using Google.Apis.Util;
namespace BloggerTest
{
class Program
{
static void Main(string[] args)
{
string apiKey= "{API-KEY}";
string blogUrl= "{BLOG-URL}";
string clientID = "{CLIENT_ID}";
string clientSec = "{CLIENT_SECRET}";
NativeApplicationClient provider = new NativeApplicationClient(GoogleAuthenticationServer.Description)
{
ClientIdentifier = clientID,
ClientSecret = clientSec
};
OAuth2Authenticator<NativeApplicationClient> auth = new OAuth2Authenticator<NativeApplicationClient>(provider, getAuth);
BloggerService blogService = new BloggerService(new BaseClientService.Initializer()
{
Authenticator = auth,
ApplicationName = "BloggerTest"
});
BlogsResource.GetByUrlRequest getReq = blogService.Blogs.GetByUrl(blogUrl);
getReq.Key = apiKey;
Blog blog = getReq.Execute();
Console.WriteLine("Blog ID: " + blog.Id);
Console.WriteLine();
PostsResource postRes = new PostsResource(blogService);
PostsResource.ListRequest postsListReq = postRes.List(blog.Id);
PostList posts = postsListReq.Execute();
for (int i = 0; i < posts.Items.Count; i++)
{
Console.WriteLine(posts.Items[i].Title);
}
Console.WriteLine();
Console.WriteLine("Done...");
Console.ReadKey();
}
private static IAuthorizationState getAuth(NativeApplicationClient arg)
{
IAuthorizationState state = new AuthorizationState(new[] { BloggerService.Scopes.Blogger.GetStringValue() })
{
Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl)
};
Uri authUri = arg.RequestUserAuthorization(state);
Process.Start(authUri.ToString());
Console.WriteLine("Please enter auth code:");
string authCode = Console.ReadLine();
return arg.ProcessUserAuthorization(authCode, state);
}
}
}输出结果：
【获取所有帖子】
PostList 里面有个.PageToken和.NextPageToken、.PrevPageToken
基本上，含义是这样：
所以我们要遍历所有的帖子的话，
要把.PageToken 设置为 NextPageToken
然后还要检测当前的PageToken是否为第一个的PageToken （因为我们已经获取过了，所以不用获取了），如果是的话，就break 出 while loop
所以把之前代码中的
PostList posts = postsListReq.Execute();删除掉
现在定义一个string为 firstToken
用来储存第一个NextPageToken
string firstToken = "";现在就是while loop
while (true)
{
PostList posts = postsListReq.Execute();
postsListReq.PageToken = posts.NextPageToken;
if (firstToken == "")
{
firstToken = posts.NextPageToken;
}
else if (firstToken != "" && posts.NextPageToken == firstToken)
{
// repeated
break;
}
for (int i = 0; i < posts.Items.Count; i++)
{
Console.WriteLine("Title: " + posts.Items[i].Title);
Console.WriteLine("URL: " + posts.Items[i].Url);
}
}完整代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Google.Apis.Blogger.v3;
using Google.Apis.Blogger.v3.Data;
using Google.Apis.Services;
using System.Diagnostics;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using DotNetOpenAuth.OAuth2;
using Google.Apis.Util;
namespace BloggerTest
{
class Program
{
static void Main(string[] args)
{
string apiKey= "{API-KEY}"
string blogUrl= "{BLOG-URL}"
string clientID = "{CLIENT_ID}";
string clientSec = "{CLIENT_SECRET}";
NativeApplicationClient provider = new NativeApplicationClient(GoogleAuthenticationServer.Description)
{
ClientIdentifier = clientID,
ClientSecret = clientSec
};
OAuth2Authenticator<NativeApplicationClient> auth = new OAuth2Authenticator<NativeApplicationClient>(provider, getAuth);
BloggerService blogService = new BloggerService(new BaseClientService.Initializer()
{
Authenticator = auth,
ApplicationName = "BloggerTest"
});
BlogsResource.GetByUrlRequest getReq = blogService.Blogs.GetByUrl(blogUrl);
getReq.Key = apiKey;
Blog blog = getReq.Execute();
Console.WriteLine("Blog ID: " + blog.Id);
Console.WriteLine();
PostsResource postRes = new PostsResource(blogService);
PostsResource.ListRequest postsListReq = postRes.List(blog.Id);
string firstToken = "";
while (true)
{
PostList posts = postsListReq.Execute();
postsListReq.PageToken = posts.NextPageToken;
if (firstToken == "")
{
firstToken = posts.NextPageToken;
}
else if (firstToken != "" && posts.NextPageToken == firstToken)
{
// repeated
break;
}
for (int i = 0; i < posts.Items.Count; i++)
{
Console.WriteLine("Title: " + posts.Items[i].Title);
Console.WriteLine("URL: " + posts.Items[i].Url);
}
}
Console.WriteLine();
Console.WriteLine("Done...");
Console.ReadKey();
}
private static IAuthorizationState getAuth(NativeApplicationClient arg)
{
IAuthorizationState state = new AuthorizationState(new[] { BloggerService.Scopes.Blogger.GetStringValue() })
{
Callback = new Uri(NativeApplicationClient.OutOfBandCallbackUrl)
};
Uri authUri = arg.RequestUserAuthorization(state);
Process.Start(authUri.ToString());
Console.WriteLine("Please enter auth code:");
string authCode = Console.ReadLine();
return arg.ProcessUserAuthorization(authCode, state);
}
}
}输出结果：
