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gitea/modules/context/api.go

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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"
"strings"
"github.com/go-macaron/csrf"
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"code.gitea.io/git"
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"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
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"github.com/Unknwon/paginater"
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macaron "gopkg.in/macaron.v1"
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)
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// APIContext is a specific macaron context for API service
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type APIContext struct {
*Context
Org *APIOrganization
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}
// APIError is error format response
// swagger:response error
type APIError struct {
Message string `json:"message"`
URL string `json:"url"`
}
// APIValidationError is error format response related to input validation
// swagger:response validationError
type APIValidationError struct {
Message string `json:"message"`
URL string `json:"url"`
}
//APIEmpty is an empty response
// swagger:response empty
type APIEmpty struct{}
//APIForbiddenError is a forbidden error response
// swagger:response forbidden
type APIForbiddenError struct {
APIError
}
//APINotFound is a not found empty response
// swagger:response notFound
type APINotFound struct{}
//APIRedirect is a redirect response
// swagger:response redirect
type APIRedirect struct{}
// Error responses error message to client with given message.
// If status is 500, also it prints error to log.
func (ctx *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 == 500 {
log.Error(4, "%s: %s", title, message)
}
ctx.JSON(status, APIError{
Message: message,
URL: base.DocURL,
})
}
// SetLinkHeader sets pagination link header by given total number and page size.
func (ctx *APIContext) SetLinkHeader(total, pageSize int) {
page := paginater.New(total, pageSize, ctx.QueryInt("page"), 0)
links := make([]string, 0, 4)
if page.HasNext() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"next\"", setting.AppURL, ctx.Req.URL.Path[1:], page.Next()))
}
if !page.IsLast() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"last\"", setting.AppURL, ctx.Req.URL.Path[1:], page.TotalPages()))
}
if !page.IsFirst() {
links = append(links, fmt.Sprintf("<%s%s?page=1>; rel=\"first\"", setting.AppURL, ctx.Req.URL.Path[1:]))
}
if page.HasPrevious() {
links = append(links, fmt.Sprintf("<%s%s?page=%d>; rel=\"prev\"", setting.AppURL, ctx.Req.URL.Path[1:], page.Previous()))
}
if len(links) > 0 {
ctx.Header().Set("Link", strings.Join(links, ","))
}
}
// RequireCSRF requires a validated a CSRF token
func (ctx *APIContext) RequireCSRF() {
headerToken := ctx.Req.Header.Get(ctx.csrf.GetHeaderName())
formValueToken := ctx.Req.FormValue(ctx.csrf.GetFormName())
if len(headerToken) > 0 || len(formValueToken) > 0 {
csrf.Validate(ctx.Context.Context, ctx.csrf)
} else {
ctx.Context.Error(401)
}
}
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// APIContexter returns apicontext as macaron middleware
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func APIContexter() macaron.Handler {
return func(c *Context) {
ctx := &APIContext{
Context: c,
}
c.Map(ctx)
}
}
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// ReferencesGitRepo injects the GitRepo into the Context
func ReferencesGitRepo() macaron.Handler {
return func(ctx *APIContext) {
// Empty repository does not have reference information.
if ctx.Repo.Repository.IsEmpty {
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return
}
// For API calls.
if ctx.Repo.GitRepo == nil {
repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
gitRepo, err := git.OpenRepository(repoPath)
if err != nil {
ctx.Error(500, "RepoRef Invalid repo "+repoPath, err)
return
}
ctx.Repo.GitRepo = gitRepo
}
}
}