Fix a bug in cos service. Add avatar api.

3 files changed, 27 insertions, 1 deletions

diff --git a/Timeline/Controllers/UserController.cs b/Timeline/Controllers/UserController.cs
index 552bfb2f..1231befb 100644
--- a/Timeline/Controllers/UserController.cs
+++ b/Timeline/Controllers/UserController.cs
@@ -79,6 +79,14 @@ namespace Timeline.Controllers
             }
         }
 
+        [HttpGet("user/{username}/avatar"), Authorize]
+        public async Task<IActionResult> GetAvatar([FromRoute] string username)
+        {
+            // TODO: test user existence.
+            var url = await _userService.GetAvatarUrl(username);
+            return Redirect(url);
+        }
+
         [HttpPost("userop/changepassword"), Authorize]
         public async Task<IActionResult> ChangePassword([FromBody] ChangePasswordRequest request)
         {
diff --git a/Timeline/Services/TencentCloudCosService.cs b/Timeline/Services/TencentCloudCosService.cs
index f1f52ec5..bc812e57 100644
--- a/Timeline/Services/TencentCloudCosService.cs
+++ b/Timeline/Services/TencentCloudCosService.cs
@@ -66,6 +66,11 @@ namespace Timeline.Services
                 }
                 if (serverException != null)
                 {
+                    if (serverException.statusCode == 404)
+                    {
+                        t.SetResult(false);
+                        return;
+                    }
                     _logger.LogError(serverException, "An server error occured when test cos object existence. Bucket : {} . Key : {} .", bucket, key);
                     t.SetException(serverException);
                     return;
diff --git a/Timeline/Services/UserService.cs b/Timeline/Services/UserService.cs
index 75ad3331..a444d434 100644
--- a/Timeline/Services/UserService.cs
+++ b/Timeline/Services/UserService.cs
@@ -140,6 +140,8 @@ namespace Timeline.Services
         /// <see cref="ChangePasswordResult.NotExists"/> if user does not exist.
         /// <see cref="ChangePasswordResult.BadOldPassword"/> if old password is wrong.</returns>
         Task<ChangePasswordResult> ChangePassword(string username, string oldPassword, string newPassword);
+
+        Task<string> GetAvatarUrl(string username);
     }
 
     public class UserService : IUserService
@@ -148,13 +150,15 @@ namespace Timeline.Services
         private readonly DatabaseContext _databaseContext;
         private readonly IJwtService _jwtService;
         private readonly IPasswordService _passwordService;
+        private readonly ITencentCloudCosService _cosService;
 
-        public UserService(ILogger<UserService> logger, DatabaseContext databaseContext, IJwtService jwtService, IPasswordService passwordService)
+        public UserService(ILogger<UserService> logger, DatabaseContext databaseContext, IJwtService jwtService, IPasswordService passwordService, ITencentCloudCosService cosService)
         {
             _logger = logger;
             _databaseContext = databaseContext;
             _jwtService = jwtService;
             _passwordService = passwordService;
+            _cosService = cosService;
         }
 
         public async Task<CreateTokenResult> CreateToken(string username, string password)
@@ -294,5 +298,14 @@ namespace Timeline.Services
             await _databaseContext.SaveChangesAsync();
             return ChangePasswordResult.Success;
         }
+
+        public async Task<string> GetAvatarUrl(string username)
+        {
+            var exists = await _cosService.Exists("avatar", username);
+            if (exists)
+                return _cosService.GetObjectUrl("avatar", username);
+            else
+                return _cosService.GetObjectUrl("avatar", "__default");
+        }
     }
 }