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// Copyright 2016 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package context
import (
"fmt"
"net/http"
"strings"
"github.com/unknwon/paginater"
"gopkg.in/macaron.v1"
log "unknwon.dev/clog/v2"
"gogs.io/gogs/internal/conf"
)
type APIContext struct {
*Context // TODO: Reduce to only needed fields instead of full shadow
// Base URL for the version of API endpoints, e.g. https://try.gogs.io/api/v1
BaseURL string
Org *APIOrganization
}
// FIXME: move this constant to github.com/gogs/go-gogs-client
const DocURL = "https://github.com/gogs/docs-api"
// Error responses error message to client with given message.
// If status is 500, also it prints error to log.
func (c *APIContext) Error(status int, title string, obj interface{}) {
var message string
if err, ok := obj.(error); ok {
message = err.Error()
} else {
message = obj.(string)
}
if status == http.StatusInternalServerError {
log.Error("%s: %s", title, message)
}
c.JSON(status, map[string]string{
"message": message,
"url": DocURL,
})
}
// NoContent renders the 204 response.
func (c *APIContext) NoContent() {
c.Status(http.StatusNoContent)
}
// NotFound renders the 404 response.
func (c *APIContext) NotFound() {
c.Status(http.StatusNotFound)
}
// ServerError renders the 500 response.
func (c *APIContext) ServerError(title string, err error) {
c.Error(http.StatusInternalServerError, title, err)
}
// NotFoundOrServerError use error check function to determine if the error
// is about not found. It responses with 404 status code for not found error,
// or error context description for logging purpose of 500 server error.
func (c *APIContext) NotFoundOrServerError(title string, errck func(error) bool, err error) {
if errck(err) {
c.NotFound()
return
}
c.ServerError(title, err)
}
// SetLinkHeader sets pagination link header by given total number and page size.
func (c *APIContext) SetLinkHeader(total, pageSize int) {
page := paginater.New(total, pageSize, c.QueryInt("page"), 0)
links := make([]string, 0, 4)
if page.HasNext() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"next\"", conf.Server.ExternalURL, c.Req.URL.Path[1:], page.Next()))
}
if !page.IsLast() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"last\"", conf.Server.ExternalURL, c.Req.URL.Path[1:], page.TotalPages()))
}
if !page.IsFirst() {
links = append(links, fmt.Sprintf("<%s%s?page=1>; rel=\"first\"", conf.Server.ExternalURL, c.Req.URL.Path[1:]))
}
if page.HasPrevious() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"prev\"", conf.Server.ExternalURL, c.Req.URL.Path[1:], page.Previous()))
}
if len(links) > 0 {
c.Header().Set("Link", strings.Join(links, ","))
}
}
func APIContexter() macaron.Handler {
return func(ctx *Context) {
c := &APIContext{
Context: ctx,
BaseURL: conf.Server.ExternalURL + "api/v1",
}
ctx.Map(c)
}
}
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