improve the releases api paging (#5831)

* improve the releases api paging

* add max limit on API paging

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -325,6 +325,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 
 - `ENABLE_SWAGGER`: **true**: Enables /api/swagger, /api/v1/swagger etc. endpoints. True or false; default is true.
 - `MAX_RESPONSE_ITEMS`: **50**: Max number of items in a page.
+- `DEFAULT_PAGING_NUM`: **30**: Default paging number of api.
 
 ## i18n (`i18n`)
 

docs/content/doc/advanced/config-cheat-sheet.zh-cn.md

@@ -194,7 +194,13 @@ menu:
 - `PULL`: **300**: 内部仓库间拉取的超时时间，单位秒
 - `GC`: **60**: git仓库GC的超时时间，单位秒
 
-## markup (`markup`)
+## API (`api`)
+
+- `ENABLE_SWAGGER`: **true**: 是否启用swagger路由 /api/swagger, /api/v1/swagger etc. endpoints. True 或 false; 默认是  true.
+- `MAX_RESPONSE_ITEMS`: **50**: 一个页面最大的项目数。
+- `DEFAULT_PAGING_NUM`: **30**: API中默认分页条数。
+
+## Markup (`markup`)
 
 外部渲染工具支持，你可以用你熟悉的文档渲染工具. 比如一下将新增一个名字为 `asciidoc` 的渲染工具which is followed `markup.` ini section. And there are some config items below.
 

modules/setting/setting.go

@@ -557,9 +557,11 @@ var (
 	API = struct {
 		EnableSwagger    bool
 		MaxResponseItems int
+		DefaultPagingNum int
 	}{
 		EnableSwagger:    true,
 		MaxResponseItems: 50,
+		DefaultPagingNum: 30,
 	}
 
 	U2F = struct {

routers/api/v1/repo/release.go

@@ -7,6 +7,7 @@ package repo
 import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
 
 	api "code.gitea.io/sdk/gitea"
 )
@@ -55,6 +56,20 @@ func GetRelease(ctx *context.APIContext) {
 	ctx.JSON(200, release.APIFormat())
 }
 
+func getPagesInfo(ctx *context.APIContext) (int, int) {
+	page := ctx.QueryInt("page")
+	if page == 0 {
+		page = 1
+	}
+	perPage := ctx.QueryInt("per_page")
+	if perPage == 0 {
+		perPage = setting.API.DefaultPagingNum
+	} else if perPage > setting.API.MaxResponseItems {
+		perPage = setting.API.MaxResponseItems
+	}
+	return page, perPage
+}
+
 // ListReleases list a repository's releases
 func ListReleases(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/releases repository repoListReleases
@@ -76,10 +91,11 @@ func ListReleases(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/ReleaseList"
+	page, limit := getPagesInfo(ctx)
 	releases, err := models.GetReleasesByRepoID(ctx.Repo.Repository.ID, models.FindReleasesOptions{
 		IncludeDrafts: ctx.Repo.AccessMode >= models.AccessModeWrite,
 		IncludeTags:   false,
-	}, 1, 2147483647)
+	}, page, limit)
 	if err != nil {
 		ctx.Error(500, "GetReleasesByRepoID", err)
 		return