simbrowser

Documentation

Overview

Package simbrowser provides facilities for simulating aspects of web browsers.

Index

• Constants
• func SetMarketShareData(global MarketShareData, regional map[CountryCode]MarketShareData) error
• type Browser
  • func ChooseForUser(ctx context.Context, uc common.UserConfig) Browser
• type BrowserType
• type CountryCode
  • func (cc CountryCode) String() string
• type MarketShare
• type MarketShareData

Constants

const (
	Chrome                  BrowserType = "Chrome"
	Firefox                             = "Firefox"
	Safari                              = "Safari"
	Edge                                = "Edge"
	InternetExplorer                    = "InternetExplorer"
	ThreeSixtySecureBrowser             = "ThreeSixtySecure"
	QQBrowser                           = "QQBrowser"
)

Possible browser types.

Functions

func SetMarketShareData

func SetMarketShareData(global MarketShareData, regional map[CountryCode]MarketShareData) error

SetMarketShareData sets the data used by ChooseForUser. The total share of the global market and each regional market must fall within the bounds established by AcceptableMinTotalMarketShare and AcceptableMaxTotalMarketShare.

Types

type Browser

type Browser struct {
	Type                  BrowserType
	SessionTicketLifetime time.Duration
	ClientHelloID         tls.ClientHelloID
}

Browser represents a specific web browser, e.g. Chrome or Firefox.

func ChooseForUser

func ChooseForUser(ctx context.Context, uc common.UserConfig) Browser

ChooseForUser chooses a web browser for the input user. If it is possible to determine the system's default web browser, a corresponding Browser instance will be returned. If not, this function chooses a browser to mimic. This choice is deterministic for a given user ID, and the distribution of choices across user IDs will reflect the market share of the top 4 browsers.

If necessary, we use region-specific market share figures. This is based on the client's geolocation and thus this function may block for a period while geolocation is determined. If the context expires before the client's geolocation can be determined, global market shares will be used.

type BrowserType

type BrowserType string

BrowserType specifies a type of web browser.

type CountryCode

type CountryCode string

CountryCode is a 2-letter ISO country code.

func (CountryCode) String

func (cc CountryCode) String() string

type MarketShare

type MarketShare float64

MarketShare is a value between 0 and 1 representing a fraction of the global market.

const (
	AcceptableMinTotalMarketShare MarketShare = 0.85
	AcceptableMaxTotalMarketShare MarketShare = 1.05
)

Bounds for data accepted by SetMarketShareData.

type MarketShareData

type MarketShareData map[BrowserType]MarketShare

MarketShareData encapsulates market share information for a region.