ADD get readme api

(cherry picked from commit 232f26ea3b)

api_document.md

@@ -3062,6 +3062,49 @@ http://localhost:3000/api/trustie/truesite/protected_branches/master.json | jq
 ```
 ---
 
+#### 获取仓库README文件
+```
+GET api/:owner/:repo/readme
+```
+*示例*
+```bash
+curl -X GET http://localhost:3000/api/trusite/trusite/readme | jq
+```
+
+*请求参数说明:*
+
+|参数名|类型|说明|
+|-|-|-|
+|owner |是|string |项目拥有者登录名  |
+|repo  |否|boolean |仓库名称  |
+|ref   |否|string |分支、tag或commit。默认: 仓库的默认分支(通常是master)|
+
+
+*返回参数说明:*
+
+|参数名|类型|说明|
+|-|-|-|
+|name           |string|文件名称|
+|path           |string|文件相对路径|
+|type           |string|文件类型， file:文件|
+|size           |int|文件大小 单位KB|
+|content        |string|文件内容，base64加密|
+
+返回值
+```json
+{
+  "type": "file",
+  "encoding": "base64",
+  "size": 13544,
+  "name": "README.md",
+  "path": "README.md",
+  "content": "Q2hpbmVzZSAmbmJzcDsgfCAmbmJzcDsgW0VuZ7i9yZWFkbWUvaW5kZXgucG5"
+}
+```
+---
+
+
+
 ### DevOps相关api
 ---
 

app/controllers/repositories_controller.rb

@@ -144,6 +144,13 @@ class RepositoriesController < ApplicationController
     render_ok
   end
 
+  def readme
+    result = Gitea::Repository::Readme::GetService.call(@owner.login, @repository.identifier, params[:ref], current_user&.gitea_token)
+
+    @readme = result[:status] === :success ? result[:body] : nil
+    render json: @readme
+  end
+
   private
 
   def find_project

app/services/gitea/repository/readme/get_service.rb

@@ -0,0 +1,39 @@
+# Gets the preferred README for a repository.
+class Gitea::Repository::Readme::GetService < Gitea::ClientService
+  attr_reader :owner, :repo, :ref, :token
+
+  # owner: owner of the repo
+  # repo: name of the repo
+  # name: The name of the commit/branch/tag. Default: the repository’s default branch (usually master)
+  # eg:
+  # Gitea::Repository::Readme::GetService.call(user.login, repo.identifier, ref, user.gitea_token)
+  def initialize(owner, repo, ref, token=nil)
+    @owner = owner
+    @repo  = repo
+    @ref   = ref || 'master'
+    @token = token
+  end
+
+  def call
+    response = get(url, params)
+    status, message, body = render_response(response)
+    json_format(status, message, body)
+  end
+
+  private
+  def params
+    Hash.new.merge(token: token, ref: ref)
+  end
+
+  def url
+    "/repos/#{owner}/#{repo}/readme".freeze
+  end
+
+  def json_format(status, message, body)
+    case status
+    when 200 then success(body)
+    when 404 then error(message, 404)
+    else error(message, status)
+    end
+  end
+end

config/routes.rb

@@ -353,6 +353,7 @@ Rails.application.routes.draw do
           post :sync_mirror
           get :top_counts
           get 'commits/:sha', to: 'repositories#commit', as: 'commit'
+          get 'readme'
         end
       end