gmail api 发送邮件不起作用 C# 控制台应用程序（身份验证范围不足）

Posted 2023-03-25

【中文标题】gmail api 发送邮件不起作用 C# 控制台应用程序（身份验证范围不足）

【英文标题】：gmail api Send Mail not working C# Console Application (Insufficient Authentication Scopes)

【发布时间】：2021-01-06 07:21:36

【问题描述】：

我是谷歌云/gmail API 的新手。在 c# 中，我想使用他们的 gmail api 来：

登录到谷歌云 - 工作 阅读列表项 - 作品 发送电子邮件 - 不起作用

第 3 步中的 Api 返回 Insufficient Request Scopes (403) 我确信我已登录到我的云帐户：我最怀疑的代码行是这样的：

 static string[] Scopes =  GmailService.Scope.GmailAddonsCurrentActionCompose, GmailService.Scope.GmailAddonsCurrentMessageAction ;

我收到了这个错误

 Request had insufficient authentication scopes. [403]
Errors [
        Message[Insufficient Permission] Location[ - ] Reason[insufficientPermissions] Domain[global]
]

// 代码

 class Program

    // If modifying these scopes, delete your previously saved credentials
    // at ~/.credentials/gmail-dotnet-quickstart.json
    static string[] Scopes =  GmailService.Scope.GmailAddonsCurrentActionCompose, GmailService.Scope.GmailAddonsCurrentMessageAction ;
    static string ApplicationName = "Gmail API .NET Quickstart";
    static void Main(string[] args)
    
        UserCredential credential;
        using (var stream =
            new FileStream("credentials.json", FileMode.Open, FileAccess.Read))
        
            // The file token.json stores the user's access and refresh tokens, and is created
            // automatically when the authorization flow completes for the first time.
            string credPath = "token.json";
            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                Scopes,
                "user",
                CancellationToken.None,
                new FileDataStore(credPath, true)).Result;
            Console.WriteLine("Credential file saved to: " + credPath);
        
        // Create Gmail API service.
        var service = new GmailService(new BaseClientService.Initializer()
        
            HttpClientInitializer = credential,
            ApplicationName = ApplicationName,
        );
        // Define parameters of request.
        UsersResource.LabelsResource.ListRequest request = service.Users.Labels.List("me");
        // List labels.
        IList<Label> labels = request.Execute().Labels;
        Console.WriteLine("Labels:");
        if (labels != null && labels.Count > 0)
        
            foreach (var labelItem in labels)
            
                Console.WriteLine("0", labelItem.Name);
            
        
        else
        
            Console.WriteLine("No labels found.");
        
        string plainText = "Body Test";
        var newMsg = new Google.Apis.Gmail.v1.Data.Message();
        newMsg.Raw = Program.Base64UrlEncode(plainText.ToString());
        try
        
            service.Users.Messages.Send(newMsg, "me").Execute();
        
        catch (Exception ex)
        
            Console.WriteLine(ex.Message);
        
        /*
         "Google.Apis.Requests.RequestError\r\nRequest had insufficient authentication scopes. 
          [403]\r\nErrors [\r\n\tMessage[Insufficient Permission] Location[ - ] Reason[insufficientPermissions] Domain[global]\r\n]\r\n"   Google.GoogleApiException
         */
        Console.Read();
    
    public static string Base64UrlEncode(string input)
    
        var inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
        return Convert.ToBase64String(inputBytes).Replace("+", "-").Replace("/", "_").Replace("=", "");
    

//从上面输出

Credential file saved to: token.json
Labels:
CHAT
SENT
INBOX
IMPORTANT
TRASH
DRAFT
SPAM
CATEGORY_FORUMS
CATEGORY_UPDATES
CATEGORY_PERSONAL
CATEGORY_PROMOTIONS
CATEGORY_SOCIAL
STARRED
UNREAD
Sent Messages
Pa0
P
Insurance
Junk E-mail
Licenses
Notes
Personal
Receipts
Travel
Work
Tickets
**Google.Apis.Requests.RequestError
Request had insufficient authentication scopes. [403]
Errors [
        Message[Insufficient Permission] Location[ - ] Reason[insufficientPermissions] Domain[global]
]**

【问题讨论】：

我正在取得一些进展。此代码基于 QuickStart。我需要使用云控制台修改云 ID 本身以允许发送邮件。现在我遇到了下一个错误......当我最终获胜时，我会用结果更新这个问题

【参考方案1】：

好的： 我决定将 GMAIL.API 提供的凭证文件放入单行环境变量中，然后将 JSON 转换为 GoogleClientSecrets：

    private static GoogleClientSecrets GetSecretsFromEnvironment()
    
        var environmentConfiguration = new ConfigurationBuilder()
            .AddEnvironmentVariables()
            .Build();   
        var secretsEnv = environmentConfiguration["GoogleSecrets"];
        var secrets = JsonConvert.DeserializeObject<GoogleClientSecrets>(secretsEnv);
        return secrets;
    

appsettings.json

  "MailSettings": 
    "account": "[e-mail]",
    "subject": "Please Confirm Account",
    "from": "[e-mail]",
    "html": "<b>Hello 0</b>"
  

由谷歌云控制台提供的credentials.json。我做了一个单行字符串并添加到 EnvironmentVariable

以及调用代码：

using Google.Apis.Auth.OAuth2;
using Google.Apis.Gmail.v1;
using Google.Apis.Services;
using Google.Apis.Util.Store;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Threading;
using System.Threading.Tasks;
namespace SendMail

    class Program
    
        // If modifying these scopes, delete your previously saved credentials
        // at ~/.credentials/gmail-dotnet-quickstart.json
        static string[] Scopes =  GmailService.Scope.GmailAddonsCurrentActionCompose, GmailService.Scope.GmailAddonsCurrentMessageAction, GmailService.Scope.GmailSend ;
        static string ApplicationName = "Restful Resting Place";
        static async Task Main(params string[] args)
        
            try
            
                var configuration = new ConfigurationBuilder()
                    .AddJsonFile("appsettings.json")
                    .Build();
                Dictionary<string, string> MailSettings;
                MailSettings = configuration.GetSection("MailSettings").GetChildren().ToDictionary(x => x.Key, x => x.Value);
                MailSettings.Add("to", args[0]);
                MailSettings.Add("link", args[1]);
                GoogleClientSecrets gSecrets = GetSecretsFromEnvironment();
                string credPath = "token.json";
                UserCredential gcredential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                       gSecrets.Secrets,
                       Scopes,
                       MailSettings["account"],
                       CancellationToken.None,
                       new FileDataStore(credPath, true));
                var service = new GmailService(new BaseClientService.Initializer()
                
                    HttpClientInitializer = gcredential,
                    ApplicationName = ApplicationName,
                );

                SendItTwo(service, MailSettings);
                Console.WriteLine()
            catch (Exception ex)
            
                Console.WriteLine(ex.Message);
               
        
        private static GoogleClientSecrets GetSecretsFromEnvironment()
        
            var environmentConfiguration = new ConfigurationBuilder()
                .AddEnvironmentVariables()
                .Build();   
            var secretsEnv = environmentConfiguration["GoogleSecrets"];
            var secrets = JsonConvert.DeserializeObject<GoogleClientSecrets>(secretsEnv);
            return secrets;
        
        public static void SendItTwo(GmailService gmail,   Dictionary<string,string> dict)
        
            MailMessage mailmsg = new MailMessage();
            
                mailmsg.Subject = dict["subject"];
                mailmsg.Body = string.Format(dict["HTML"],dict["link"]);
                mailmsg.From = new MailAddress(dict["from"]);
                mailmsg.To.Add(new MailAddress(dict["to"]));         
                mailmsg.IsBodyHtml = true;
            

            ////add attachment if specified
            if (dict.ContainsKey("attachement"))
            
                if (File.Exists(dict["attachment"]))
                
                    Attachment data = new Attachment(dict["attachment"]);
                    mailmsg.Attachments.Add(data);

                else
                
                    Console.WriteLine("Error: Invalid Attachemnt");
                
                 
            //Make mail message a Mime message
            MimeKit.MimeMessage mimemessage = MimeKit.MimeMessage.CreateFromMailMessage(mailmsg);
            Google.Apis.Gmail.v1.Data.Message finalmessage = new Google.Apis.Gmail.v1.Data.Message();
            finalmessage.Raw = Base64UrlEncode(mimemessage.ToString());  
            var result = gmail.Users.Messages.Send(finalmessage, "me").Execute();
         
        public static string Base64UrlEncode(string input)
        
            var inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
            return Convert.ToBase64String(inputBytes).Replace("+", "-").Replace("/", "_").Replace("=", "");