Golang Context Examples

Example #1

File: update.go Project: rogeriomarques/gohackernews

// 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())
}

Example #2

File: update.go Project: send-to/server

// 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())
}

Example #3

File: show.go Project: BobbWu/fragmenta-cms

// 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)
}

Example #4

File: show.go Project: BobbWu/fragmenta-cms

// 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()

}

Example #5

File: update.go Project: rogeriomarques/gohackernews

// 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())
}

Example #6

File: create.go Project: intfrr/sendto

// 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())
}

Example #7

File: update.go Project: BobbWu/fragmenta-cms

// 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())
}

Example #8

File: show.go Project: send-to/server

// 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)
}

Example #9

File: update.go Project: BobbWu/fragmenta-cms

// 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())
}

Example #10

File: update.go Project: intfrr/sendto

// 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())
}

Example #11

File: update.go Project: BobbWu/fragmenta-cms

// 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()
}

Example #12

File: update.go Project: send-to/server

// 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())
}

Example #13

File: show.go Project: gnoirzox/gohackernews

// 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()
}

Example #14

File: index.go Project: BobbWu/fragmenta-cms

// 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()

}

Example #15

File: create.go Project: BobbWu/fragmenta-cms

// 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())
}

Example #16

File: update.go Project: dejanstrbac/gohackernews

// 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)
	}

	// Clean params according to role
	accepted := comments.AllowedParams()
	if authorise.CurrentUser(context).Admin() {
		accepted = comments.AllowedParamsAdmin()
	}
	cleanedParams := params.Clean(accepted)

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

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

Example #17

File: show.go Project: rogeriomarques/gohackernews

// 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)
	}

	// 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)
	view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))

	return view.Render()
}

Example #18

File: index.go Project: BobbWu/fragmenta-cms

// Serve a get request at /images
//
//
func HandleIndex(context router.Context) error {

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

	// Setup context for template
	view := view.New(context)

	// Build a query
	q := images.Query()

	// Show only published (defaults to showing all)
	// q.Apply(status.WherePublished)

	// Order by required order, or default to id asc
	switch context.Param("order") {

	case "1":
		q.Order("created_at desc")

	case "2":
		q.Order("updated_at desc")

	case "3":
		q.Order("name asc")

	default:
		q.Order("id desc")

	}

	// Filter if necessary - this assumes name and summary cols
	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_tsquery(?) )", filter)
	}

	// Fetch the images
	imagesList, err := images.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Serve template
	view.AddKey("filter", filter)
	view.AddKey("images", imagesList)
	// Can we add these programatically?
	view.AddKey("admin_links", helpers.Link("Create image", images.New().URLCreate()))

	return view.Render()

}

Example #19

File: authorise.go Project: gnoirzox/gohackernews

// Resource authorises the path and resource for the current user
// if model is nil it is ignored and permission granted
func Resource(c router.Context, r ResourceModel) error {

	// If not public path, check based on user role
	user := c.Get("current_user").(*users.User)
	switch user.Role {
	case users.RoleAdmin:
		return authoriseAdmin(c, r)
	default:
		return authoriseReader(c, r)
	}

}

Example #20

File: login.go Project: dejanstrbac/gohackernews

func loginUser(context router.Context, user *users.User) error {
	// Now save the user details in a secure cookie, so that we remember the next request
	session, err := auth.Session(context, context.Request())
	if err != nil {
		return err
	}

	context.Logf("#info Login success for user: %d %s", user.Id, user.Email)
	session.Set(auth.SessionUserKey, fmt.Sprintf("%d", user.Id))
	session.Save(context)
	return nil
}

Example #21

File: login.go Project: send-to/server

// HandleLoginShow handles GET /users/login
func HandleLoginShow(context router.Context) error {

	// Check we have no current user
	u := authorise.CurrentUser(context)
	if !u.Anon() {
		return router.Redirect(context, fmt.Sprintf("/users/%d", u.Id))
	}

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

Example #22

File: show.go Project: intfrr/sendto

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

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

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

Example #23

File: create.go Project: BobbWu/fragmenta-cms

// POST pages/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)
	}

	id, err := pages.Create(params.Map())

	if err != nil {
		context.Logf("#info Failed to create page %v", params)
		return router.InternalError(err)
	}

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

	// Redirect to the new page
	p, err := pages.Find(id)
	if err != nil {
		context.Logf("#error Error creating page,%s", err)
	}

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

Example #24

File: index.go Project: BobbWu/fragmenta-cms

// HandleIndex displays a list of posts
func HandleIndex(context router.Context) error {

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

	// Build a query
	q := posts.Query()

	// Order by required order, or default to id asc
	switch context.Param("order") {

	case "1":
		q.Order("created desc")

	case "2":
		q.Order("updated desc")

	case "3":
		q.Order("name asc")

	default:
		q.Order("id asc")

	}

	// Filter if necessary - this assumes name and summary cols
	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_tsquery(?) )", filter)
	}

	// Fetch the posts
	results, err := posts.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("filter", filter)
	view.AddKey("posts", results)
	return view.Render()

}

Example #25

File: password.go Project: BobbWu/fragmenta-cms

// POST /users/password/reset
func HandlePasswordResetSend(context router.Context) error {

	// Find the user by email (if not found let them know)
	// Find the user by hex token in the db
	email := context.Param("email")
	user, err := users.First(users.Where("email=?", email))
	if err != nil {
		return router.Redirect(context, "/users/password/reset?message=invalid_email")
	}

	// Generate a random token and url for the email
	token := auth.BytesToHex(auth.RandomToken())

	// Generate the url to use in our email
	base := fmt.Sprintf("%s://%s", context.Request().URL.Scheme, context.Request().URL.Host)
	url := fmt.Sprintf("%s/users/password?token=%s", base, token)

	context.Logf("#info sending reset email:%s url:%s", email, url)

	// Update the user record with with this token
	p := map[string]string{"reset_token": token}
	user.Update(p)

	// Send a password reset email out
	//mail.Send("mymail")

	// Tell the user what we have done
	return router.Redirect(context, "/users/password/sent")
}

Example #26

File: update.go Project: maqiv/gohackernews

// HandleUpdate or PUT /users/1/update
func HandleUpdate(context router.Context) error {

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

	// Authorise
	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)
	}

	context.Logf("PARAMS RECD:%v", params)

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

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

Example #27

File: show.go Project: intfrr/sendto

// HandleShowName displays a single user by name
func HandleShowName(context router.Context) error {

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

	// Render the template
	view := view.New(context)
	view.AddKey("user", user)
	view.Template("users/views/show.html.got")
	return view.Render()
}

Example #28

File: authenticate.go Project: gnoirzox/gohackernews

// AuthenticityToken checks the token in the current request
func AuthenticityToken(context router.Context) error {
	token := context.Param(auth.SessionTokenKey)
	err := auth.CheckAuthenticityToken(token, context.Request())
	if err != nil {
		// If the check fails, log out the user and completely clear the session
		context.Logf("#warn invalid authenticity token at %v", context)
		session, err := auth.SessionGet(context.Request())
		if err != nil {
			return err
		}
		session.Clear(context.Writer())
	}

	return err
}

Example #29

File: show.go Project: rogeriomarques/gohackernews

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

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

	// No auth as all are public - if we restricted by status we might need to authorise here

	// Render the template
	view := view.New(context)
	view.AddKey("comment", comment)
	view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
	return view.Render()
}

Example #30

File: show.go Project: send-to/server

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

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

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

	return render(context, page)
}