[C#] 不用 Access Token 如何獲取粉絲專頁的 UID
2024-02-29
記錄一下，最近有需求就是不要等入下取得臉書的公開資訊，所以目前解決方案就是
透過爬蟲，今天的範例，就是不登入狀況下，沒有 Access Token 下取得 LadyGaGa 臉書粉絲專業的 Fanspage ID
主要也是透過 embed fanpage 的網址
https://www.facebook.com/plugins/fan.php?connections=99&id=ladygaga
接下來就是透過 Regex Parse 取得的原始碼的部分
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| using (HttpClient client = new HttpClient()) | |
| { | |
| // 設定 User-Agent 為 Chrome | |
| client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3"); | |
| // 設定 Accept-Language 為英文 | |
| client.DefaultRequestHeaders.Add("Accept-Language", "en-US"); | |
| var fanspageCode = "ladygaga"; | |
| try | |
| { | |
| // 要訪問的URL | |
| string url = "https://www.facebook.com/plugins/fan.php?connections=99&id="+ fanspageCode; | |
| HttpResponseMessage response = client.GetAsync(url).Result; | |
| // 確保請求成功 | |
| response.EnsureSuccessStatusCode(); | |
| // 取得回應內容 | |
| var responseBody = response.Content.ReadAsStringAsync().Result; | |
| //regex for get fanspage id | |
| var pattern = @"href=""https://www\.facebook\.com/(\d+)\?ref=embed_page"""; | |
| Match match = Regex.Match(responseBody, pattern); | |
| // 檢查是否找到匹配 | |
| if (match.Success) | |
| { | |
| // 取得捕獲組中的值 | |
| string followersCount = match.Groups[1].Value; | |
| // 將找到的 id 輸出 | |
| Console.WriteLine($"Fanspage UID: {followersCount}"); | |
| } | |
| else | |
| { | |
| Console.WriteLine("No Match."); | |
| } | |
| } | |
| catch (HttpRequestException ex) | |
| { | |
| Console.WriteLine($"Request Error: {ex.Message}"); | |
| } | |
| } | |
就把這放在這希望幫到有需要的人