Golang router.Context类代码示例

// HandleUpdate handles the POST of the form to update a story
func HandleUpdate(context router.Context) error {

	// Find the story
	story, err := stories.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update story
	err = authorise.ResourceAndAuthenticity(context, story)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the story from params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}
	err = story.Update(params.Map())
	if err != nil {
		return err // Create returns a router.Error
	}

	err = updateStoriesRank()
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to story
	return router.Redirect(context, story.URLShow())
}

// HandleUpdate handles the POST of the form to update a page
func HandleUpdate(context router.Context) error {

	// Find the page
	page, err := pages.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update page
	err = authorise.ResourceAndAuthenticity(context, page)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the page from params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}
	err = page.Update(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to page
	return router.Redirect(context, page.URLShow())
}

// HandleShowPath serves requests to a custom page url
func HandleShowPath(context router.Context) error {

	// Setup context for template
	path := context.Path()

	// If no pages or users exist, redirect to set up page
	if missingUsersAndPages() {
		return router.Redirect(context, "/fragmenta/setup")
	}

	q := pages.Query().Where("url=?", path).Limit(1)
	pages, err := pages.FindAll(q)
	if err != nil || len(pages) == 0 {
		return router.NotFoundError(err)
	}

	// Get the first of pages to render
	page := pages[0]

	// For show path of pages, we authorise showing the page FOR ALL users if it is published
	if !page.IsPublished() {
		// Authorise
		err = authorise.Resource(context, page)
		if err != nil {
			return router.NotAuthorizedError(err)
		}
	}

	return renderPage(context, page)
}

// HandleShow serve a get request at /users/1
func HandleShow(context router.Context) error {

	// Find the user
	user, err := users.Find(context.ParamInt("id"))
	if err != nil {
		context.Logf("#error parsing user id: %s", err)
		return router.NotFoundError(err)
	}

	userMeta := fmt.Sprintf("%s – %s", user.Name, user.Summary)

	// Set up view
	view := view.New(context)

	// Find the first image which matches this user
	image, err := images.Find(user.ImageID)
	if err == nil {
		// only add image key if we have one
		view.AddKey("image", image)
	}

	// Render the Template
	view.AddKey("user", user)
	view.AddKey("meta_title", userMeta)
	view.AddKey("meta_desc", userMeta)
	view.AddKey("meta_keywords", user.Keywords())
	return view.Render()

}

// HandleUpdate responds to POST /comments/update
func HandleUpdate(context router.Context) error {

	// Find the comment
	comment, err := comments.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update comment, check auth token
	err = authorise.ResourceAndAuthenticity(context, comment)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the comment from params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	err = comment.Update(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to comment
	return router.Redirect(context, comment.URLShow())
}

// HandleCreate handles the POST of the create form for pages
func HandleCreate(context router.Context) error {

	// Authorise
	err := authorise.ResourceAndAuthenticity(context, nil)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Setup context
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	id, err := pages.Create(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Log creation
	context.Logf("#info Created page id,%d", id)

	// Redirect to the new page
	m, err := pages.Find(id)
	if err != nil {
		return router.InternalError(err)
	}

	return router.Redirect(context, m.URLIndex())
}

// HandleUpdate serves POST or PUT /tags/1/update
func HandleUpdate(context router.Context) error {

	// Find the tag
	tag, err := tags.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise
	err = authorise.Resource(context, tag)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the tag
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	err = tag.Update(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to tag
	return router.Redirect(context, tag.URLShow())
}

// HandleShowPath serves requests to a custom page url
func HandleShowPath(context router.Context) error {

	// Setup context for template
	path := context.Path()

	q := pages.Query().Where("url=?", path).Limit(1)
	pages, err := pages.FindAll(q)
	if err != nil || len(pages) == 0 {
		return router.NotFoundError(err)
	}

	// Get the first of pages to render
	page := pages[0]

	// If not published, check authorisation
	if !page.IsPublished() {
		// Authorise
		err = authorise.Resource(context, page)
		if err != nil {
			return router.NotAuthorizedError(err)
		}
	}

	return render(context, page)
}

// HandleUpdate handles the POST of the form to update a post
func HandleUpdate(context router.Context) error {

	// Find the post
	post, err := posts.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update post
	err = authorise.Resource(context, post)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the post from params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}
	err = post.Update(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to post
	return router.Redirect(context, post.URLShow())
}

// HandleUpdateShow handles the POST of the form to update a file
func HandleUpdate(context router.Context) error {

	// Find the file
	file, err := files.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update file
	err = authorise.Resource(context, file)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Update the file from params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	// Find the to user, by querying users on username or email
	// Set the user id if found, else return 404 error, user not found

	// TODO: Make *sure* this only accepts the params we want
	err = file.Update(params.Map())
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to file
	return router.Redirect(context, file.URLShow())
}

// HandleUpdateShow renders the form to update a post
func HandleUpdateShow(context router.Context) error {

	// Find the post
	post, err := posts.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update post
	err = authorise.Resource(context, post)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Find users for author details
	users, err := users.FindAll(users.Admins())
	if err != nil {
		return router.NotFoundError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("post", post)
	view.AddKey("users", users)
	return view.Render()
}

// HandleUpdate handles the POST of the form to update a user
func HandleUpdate(context router.Context) error {

	// Find the user
	user, err := users.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update user
	err = authorise.ResourceAndAuthenticity(context, user)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Get the params
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	// Clean params further for customers, they may only update email, password, key
	allowedParams := params.Map()
	u := authorise.CurrentUser(context)
	if !u.Admin() {
		//	allowedParams = params.Clean(users.AllowedParamsCustomer())
	}

	err = user.Update(allowedParams)
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect to user
	return router.Redirect(context, user.URLShow())
}

// HandleShow displays a single story
func HandleShow(context router.Context) error {

	// Find the story
	story, err := stories.Find(context.ParamInt("id"))
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect requests to the canonical url
	if context.Path() != story.URLShow() {
		return router.Redirect(context, story.URLShow())
	}

	// Find the comments for this story
	// Fetch the comments
	q := comments.Where("story_id=?", story.Id).Order(comments.RankOrder)
	rootComments, err := comments.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("story", story)
	view.AddKey("meta_title", story.Name)
	view.AddKey("meta_desc", story.Summary)
	view.AddKey("meta_keywords", story.Name)
	view.AddKey("comments", rootComments)

	return view.Render()
}

// HandleIndex serves a get request at /pages
func HandleIndex(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Fetch the pages
	q := pages.Query().Order("url asc")

	// Filter if necessary
	filter := context.Param("filter")
	if len(filter) > 0 {
		filter = strings.Replace(filter, "&", "", -1)
		filter = strings.Replace(filter, " ", "", -1)
		filter = strings.Replace(filter, " ", " & ", -1)
		q.Where("(to_tsvector(name) || to_tsvector(summary) || to_tsvector(url) @@ to_tsquery(?) )", filter)
	}

	pageList, err := pages.FindAll(q)
	if err != nil {
		context.Logf("#error Error indexing pages %s", err)
		return router.InternalError(err)
	}

	// Serve template
	view := view.New(context)
	view.AddKey("filter", filter)
	view.AddKey("pages", pageList)
	return view.Render()

}

// POST users/create
func HandleCreate(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Setup context
	params, err := context.Params()
	if err != nil {
		return router.InternalError(err)
	}

	// We should check for duplicates in here
	id, err := users.Create(params.Map())
	if err != nil {
		return router.InternalError(err, "Error", "Sorry, an error occurred creating the user record.")
	} else {
		context.Logf("#info Created user id,%d", id)
	}

	// Redirect to the new user
	p, err := users.Find(id)
	if err != nil {
		return router.InternalError(err, "Error", "Sorry, an error occurred finding the new user record.")
	}

	return router.Redirect(context, p.URLIndex())
}