forked from araddon/qlbridge
/
url_email.go
857 lines (747 loc) · 22.5 KB
/
url_email.go
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package builtins
import (
"fmt"
"net/mail"
"net/url"
"regexp"
"strings"
u "github.com/araddon/gou"
"github.com/mssola/user_agent"
"github.com/araddon/qlbridge/expr"
"github.com/araddon/qlbridge/value"
"github.com/araddon/qlbridge/vm"
)
var _ = u.EMPTY
// email a string, parses email and makes sure it is valid
//
// email("Bob <bob@bob.com>") => bob@bob.com, true
// email("Bob <bob>") => "", false
//
type Email struct{}
// Type string
func (m *Email) Type() value.ValueType { return value.StringType }
func (m *Email) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 args for Email(field) but got %s", n)
}
return emailEval, nil
}
func emailEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := args[0]
if val == nil || val.Nil() || val.Err() {
return nil, false
}
emailStr := ""
switch v := val.(type) {
case value.StringValue:
emailStr = v.ToString()
case value.Slice:
if v.Len() > 0 {
v1 := v.SliceValue()[0]
emailStr = v1.ToString()
}
}
if emailStr == "" {
return value.EmptyStringValue, false
}
if em, err := mail.ParseAddress(emailStr); err == nil {
return value.NewStringValue(strings.ToLower(em.Address)), true
}
return value.EmptyStringValue, false
}
// emailname a string, parses email
//
// emailname("Bob <bob@bob.com>") => Bob
//
type EmailName struct{}
// Type string
func (m *EmailName) Type() value.ValueType { return value.StringType }
func (m *EmailName) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for EmailName(fieldname) but got %s", n)
}
return emailNameEval, nil
}
func emailNameEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val, ok := value.ValueToString(args[0])
if !ok || val == "" {
return value.EmptyStringValue, false
}
if em, err := mail.ParseAddress(val); err == nil {
return value.NewStringValue(em.Name), true
}
return value.EmptyStringValue, false
}
// emaildomain parses email and returns domain
//
// emaildomain("Bob <bob@bob.com>") => bob.com
//
type EmailDomain struct{}
// Type string
func (m *EmailDomain) Type() value.ValueType { return value.StringType }
func (m *EmailDomain) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for EmailDomain(fieldname) but got %s", n)
}
return emailDomainEval, nil
}
func emailDomainEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val, ok := value.ValueToString(args[0])
if !ok || val == "" {
return value.EmptyStringValue, false
}
if em, err := mail.ParseAddress(strings.ToLower(val)); err == nil {
parts := strings.SplitN(strings.ToLower(em.Address), "@", 2)
if len(parts) == 2 {
return value.NewStringValue(parts[1]), true
}
}
return value.EmptyStringValue, false
}
// Domains Extract Domains from a Value, or Values (must be urlish), doesn't do much/any validation
//
// domains("http://www.lytics.io/index.html") => []string{"lytics.io"}
//
type Domains struct{}
// Type strings
func (m *Domains) Type() value.ValueType { return value.StringsType }
func (m *Domains) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) == 0 {
return nil, fmt.Errorf("Expected 1 or more args for Domains(arg, ...) but got %s", n)
}
return domainsEval, nil
}
func domainsEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
svals := value.NewStringsValue(make([]string, 0))
for _, val := range args {
switch v := val.(type) {
case value.StringValue:
svals.Append(v.Val())
case value.StringsValue:
for _, sv := range v.Val() {
svals.Append(sv)
}
}
}
// Since its empty, we will just re-use it
if svals.Len() == 0 {
return nil, false
}
// Now convert to domains
domains := value.NewStringsValue(make([]string, 0))
for _, val := range svals.Val() {
urlstr := strings.ToLower(val)
if len(urlstr) < 4 {
continue
}
// May not have an http prefix, if not assume it
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
if urlParsed, err := url.Parse(urlstr); err == nil {
parts := strings.Split(urlParsed.Host, ".")
if len(parts) > 2 {
parts = parts[len(parts)-2:]
}
if len(parts) > 0 {
domains.Append(strings.Join(parts, "."))
}
}
}
if domains.Len() == 0 {
return nil, false
}
return domains, true
}
// Extract Domain from a Value, or Values (must be urlish), doesn't do much/any validation.
// if input is a list of strings, only first is evaluated, for plural see domains()
//
// domain("http://www.lytics.io/index.html") => "lytics.io"
//
type Domain struct{}
// Type string
func (m *Domain) Type() value.ValueType { return value.StringType }
func (m *Domain) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for Domain(field) but got %s", n)
}
return domainEval, nil
}
func domainEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
urlstr := ""
switch itemT := args[0].(type) {
case value.StringValue:
urlstr = itemT.Val()
case value.StringsValue:
for _, sv := range itemT.Val() {
urlstr = sv
break
}
}
urlstr = strings.ToLower(urlstr)
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
if urlParsed, err := url.Parse(urlstr); err == nil && len(urlParsed.Host) > 2 {
parts := strings.Split(urlParsed.Host, ".")
if len(parts) > 2 {
parts = parts[len(parts)-2:]
}
if len(parts) > 0 {
return value.NewStringValue(strings.Join(parts, ".")), true
}
}
return value.EmptyStringValue, false
}
// Extract host from a String (must be urlish), doesn't do much/any validation
// In the event the value contains more than one input url, will ONLY evaluate first
//
// host("http://www.lytics.io/index.html") => www.lytics.io
//
type Host struct{}
// Type string
func (m *Host) Type() value.ValueType { return value.StringType }
func (m *Host) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for Host(field) but got %s", n)
}
return HostEval, nil
}
func HostEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
urlstr := strings.ToLower(val)
if len(urlstr) < 8 {
return value.EmptyStringValue, false
}
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
if urlParsed, err := url.Parse(urlstr); err == nil {
//u.Infof("url.parse: %#v", urlParsed)
return value.NewStringValue(urlParsed.Host), true
}
return value.EmptyStringValue, false
}
// Extract hosts from a Strings (must be urlish), doesn't do much/any validation
//
// hosts("http://www.lytics.io", "http://www.activate.lytics.io") => www.lytics.io, www.activate.lytics.io
//
type Hosts struct{}
// Type strings
func (m *Hosts) Type() value.ValueType { return value.StringsType }
func (m *Hosts) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) == 0 {
return nil, fmt.Errorf("Expected 1 or more args for Hosts() but got %s", n)
}
return HostsEval, nil
}
func HostsEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
vals := value.NewStringsValue(make([]string, 0))
for _, item := range args {
switch itemT := item.(type) {
case value.StringValue:
val := itemT.Val()
if len(val) > 0 {
vals.Append(itemT.Val())
}
case value.Slice:
for _, sv := range itemT.SliceValue() {
val := sv.ToString()
if len(val) > 0 {
vals.Append(val)
}
}
}
}
if vals.Len() == 0 {
return vals, false
}
hosts := value.NewStringsValue(make([]string, 0))
for _, val := range vals.Val() {
urlstr := strings.ToLower(val)
if len(urlstr) < 8 {
continue
}
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
if urlParsed, err := url.Parse(urlstr); err == nil {
//u.Infof("url.parse: %#v", urlParsed)
hosts.Append(urlParsed.Host)
}
}
if hosts.Len() == 0 {
return nil, false
}
return hosts, true
}
// url decode a string
//
// urldecode("http://www.lytics.io/index.html") => http://www.lytics.io
//
// In the event the value contains more than one input url, will ONLY evaluate first
//
type UrlDecode struct{}
// Type string
func (m *UrlDecode) Type() value.ValueType { return value.StringType }
func (m *UrlDecode) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for UrlDecode(field) but got %s", n)
}
return urlDecodeEval, nil
}
func urlDecodeEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
val, err := url.QueryUnescape(val)
return value.NewStringValue(val), err == nil
}
// UrlPath Extract url path from a String (must be urlish), doesn't do much/any validation
//
// path("http://www.lytics.io/blog/index.html") => blog/index.html
//
// In the event the value contains more than one input url, will ONLY evaluate first
//
type UrlPath struct{}
// Type string
func (m *UrlPath) Type() value.ValueType { return value.StringType }
func (m *UrlPath) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for UrlPath() but got %s", n)
}
return urlPathEval, nil
}
func urlPathEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
urlstr := strings.ToLower(val)
if len(urlstr) > 6 && !strings.Contains(urlstr[:5], "/") {
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
}
if urlParsed, err := url.Parse(urlstr); err == nil {
return value.NewStringValue(urlParsed.Path), true
}
return value.EmptyStringValue, false
}
// Qs Extract qs param from a string (must be url valid)
//
// qs("http://www.lytics.io/?utm_source=google","utm_source") => "google", true
//
type Qs struct{}
// Type string
func (m *Qs) Type() value.ValueType { return value.StringType }
func (m *Qs) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 2 {
return nil, fmt.Errorf("Expected 2 args for Qs(url, param) but got %s", n)
}
return qsEval, nil
}
func qsEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
urlstr := ""
switch itemT := args[0].(type) {
case value.StringValue:
urlstr = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
urlstr = itemT.SliceValue()[0].ToString()
}
if urlstr == "" {
return value.EmptyStringValue, false
}
qsParam, ok := value.ValueToString(args[1])
if !ok || qsParam == "" {
return value.EmptyStringValue, false
}
if len(urlstr) > 6 && !strings.Contains(urlstr[:5], "/") {
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
}
if urlParsed, err := url.Parse(urlstr); err == nil {
qsval := urlParsed.Query().Get(qsParam)
if len(qsval) > 0 {
return value.NewStringValue(qsval), true
}
}
return value.EmptyStringValue, false
}
// Qs Extract qs param from a string (must be url valid)
//
// qs("http://www.lytics.io/?utm_source=google","utm_source") => "google", true
//
type QsDeprecate struct{}
// Type string
func (m *QsDeprecate) Type() value.ValueType { return value.StringType }
func (m *QsDeprecate) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 2 {
return nil, fmt.Errorf("Expected 2 args for Qs(url, param) but got %s", n)
}
return qsDeprecateEval, nil
}
func qsDeprecateEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
urlstr := strings.ToLower(val)
keyVal, ok := value.ValueToString(args[1])
if !ok || keyVal == "" {
return value.EmptyStringValue, false
}
if len(urlstr) > 6 && !strings.Contains(urlstr[:5], "/") {
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
}
if urlParsed, err := url.Parse(urlstr); err == nil {
qsval := urlParsed.Query().Get(keyVal)
if len(qsval) > 0 {
return value.NewStringValue(qsval), true
}
}
return value.EmptyStringValue, false
}
// UrlMain remove the querystring and scheme from url
//
// urlmain("http://www.lytics.io/?utm_source=google") => "www.lytics.io/", true
//
type UrlMain struct{}
// Type string
func (m *UrlMain) Type() value.ValueType { return value.StringType }
func (m *UrlMain) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 arg for UrlMain() but got %s", n)
}
return urlMainEval, nil
}
func urlMainEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
if up, err := url.Parse(val); err == nil {
return value.NewStringValue(fmt.Sprintf("%s%s", up.Host, up.Path)), true
}
return value.EmptyStringValue, false
}
// UrlMinusQs removes a specific query parameter and its value from a url
//
// urlminusqs("http://www.lytics.io/?q1=google&q2=123", "q1") => "http://www.lytics.io/?q2=123", true
//
type UrlMinusQs struct{}
// Type string
func (m *UrlMinusQs) Type() value.ValueType { return value.StringType }
func (m *UrlMinusQs) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 2 {
return nil, fmt.Errorf("Expected 2 args for UrlMinusQs(url, qsparam) but got %s", n)
}
return urlMinusQsEval, nil
}
func urlMinusQsEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
urlstr := ""
switch itemT := args[0].(type) {
case value.StringValue:
urlstr = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
urlstr = itemT.SliceValue()[0].ToString()
}
if urlstr == "" {
return value.EmptyStringValue, false
}
if len(urlstr) > 6 && !strings.Contains(urlstr[:5], "/") {
if !strings.HasPrefix(urlstr, "http") {
urlstr = "http://" + urlstr
}
}
keyVal, ok := value.ValueToString(args[1])
if !ok || keyVal == "" {
return value.EmptyStringValue, false
}
if up, err := url.Parse(urlstr); err == nil {
qsval := up.Query()
_, ok := qsval[keyVal]
if !ok {
return value.NewStringValue(fmt.Sprintf("%s://%s%s?%s", up.Scheme, up.Host, up.Path, up.RawQuery)), true
}
qsval.Del(keyVal)
up.RawQuery = qsval.Encode()
if up.RawQuery == "" {
return value.NewStringValue(fmt.Sprintf("%s://%s%s", up.Scheme, up.Host, up.Path)), true
}
return value.NewStringValue(fmt.Sprintf("%s://%s%s?%s", up.Scheme, up.Host, up.Path, up.RawQuery)), true
}
return value.EmptyStringValue, false
}
// UrlWithQueryFunc strips a url and retains only url parameters that match
// the supplied regular expressions.
//
// url.matchqs(url, re1, re2, ...) => url_withoutqs
//
type UrlWithQuery struct{}
// Type string
func (m *UrlWithQuery) Type() value.ValueType { return value.StringType }
func (*UrlWithQuery) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) == 0 {
return nil, fmt.Errorf("Expected at least 1 args for urlwithqs(url, param, param2) but got %s", n)
}
if len(n.Args) == 1 {
return UrlWithQueryEval(nil), nil
}
// Memoize these compiled reg-expressions
include := make([]*regexp.Regexp, 0)
for _, n := range n.Args[1:] {
keyItem, ok := vm.Eval(nil, n)
if !ok {
return nil, fmt.Errorf("Could not evaluate %v", n)
}
keyVal, ok := value.ValueToString(keyItem)
if !ok || keyVal == "" {
return nil, fmt.Errorf("Could not convert %q to regex", n.String())
}
keyRegexp, err := regexp.Compile(keyVal)
if err != nil {
return nil, err
}
include = append(include, keyRegexp)
}
return UrlWithQueryEval(include), nil
}
// UrlWithQueryEval pass reg-expressions to match qs args.
// Must match one regexp or else the qs param is dropped.
func UrlWithQueryEval(include []*regexp.Regexp) expr.EvaluatorFunc {
return func(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
up, err := url.Parse(val)
if err != nil {
return value.EmptyStringValue, false
}
if len(args) == 1 {
return value.NewStringValue(fmt.Sprintf("%s%s", up.Host, up.Path)), true
}
oldvals := up.Query()
newvals := make(url.Values)
for k, v := range oldvals {
// include fields specified as arguments
for _, pattern := range include {
if pattern.MatchString(k) {
newvals[k] = v
break
}
}
}
up.RawQuery = newvals.Encode()
if up.RawQuery == "" {
return value.NewStringValue(fmt.Sprintf("%s%s", up.Host, up.Path)), true
}
return value.NewStringValue(fmt.Sprintf("%s%s?%s", up.Host, up.Path, up.RawQuery)), true
}
}
// UserAgent Extract user agent features
//
// useragent(user_agent_field,"mobile") => "true", true
//
type UserAgent struct{}
// Type string
func (m *UserAgent) Type() value.ValueType { return value.StringType }
func (m *UserAgent) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 2 {
return nil, fmt.Errorf("Expected 2 args for UserAgent(user_agent_field, feature) but got %s", n)
}
return userAgentEval, nil
}
func userAgentEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return value.EmptyStringValue, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return value.EmptyStringValue, false
}
/*
fmt.Printf("%v\n", ua.Mobile()) // => false
fmt.Printf("%v\n", ua.Bot()) // => false
fmt.Printf("%v\n", ua.Mozilla()) // => "5.0"
fmt.Printf("%v\n", ua.Platform()) // => "X11"
fmt.Printf("%v\n", ua.OS()) // => "Linux x86_64"
name, version := ua.Engine()
fmt.Printf("%v\n", name) // => "AppleWebKit"
fmt.Printf("%v\n", version) // => "537.11"
name, version = ua.Browser()
fmt.Printf("%v\n", name) // => "Chrome"
fmt.Printf("%v\n", version) // => "23.0.1271.97"
// Let's see an example with a bot.
ua.Parse("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
fmt.Printf("%v\n", ua.Bot()) // => true
name, version = ua.Browser()
fmt.Printf("%v\n", name) // => Googlebot
fmt.Printf("%v\n", version) // => 2.1
*/
method, ok := value.ValueToString(args[1])
if !ok || method == "" {
return value.EmptyStringValue, false
}
ua := user_agent.New(val)
switch strings.ToLower(method) {
case "bot":
return value.NewStringValue(fmt.Sprintf("%v", ua.Bot())), true
case "mobile":
return value.NewStringValue(fmt.Sprintf("%v", ua.Mobile())), true
case "mozilla":
return value.NewStringValue(ua.Mozilla()), true
case "platform":
return value.NewStringValue(ua.Platform()), true
case "os":
return value.NewStringValue(ua.OS()), true
case "engine":
name, _ := ua.Engine()
return value.NewStringValue(name), true
case "engine_version":
_, version := ua.Engine()
return value.NewStringValue(version), true
case "browser":
name, _ := ua.Browser()
return value.NewStringValue(name), true
case "browser_version":
_, version := ua.Browser()
return value.NewStringValue(version), true
}
return value.EmptyStringValue, false
}
// UserAgentMap Extract user agent features
//
// useragent.map(user_agent_field) => {"mobile": "false","platform":"X11"}, true
//
type UserAgentMap struct{}
// Type MapString
func (m *UserAgentMap) Type() value.ValueType { return value.MapStringType }
func (m *UserAgentMap) Validate(n *expr.FuncNode) (expr.EvaluatorFunc, error) {
if len(n.Args) != 1 {
return nil, fmt.Errorf("Expected 1 args for useragentmap(user_agent) but got %s", n)
}
return userAgentMapEval, nil
}
func userAgentMapEval(ctx expr.EvalContext, args []value.Value) (value.Value, bool) {
val := ""
switch itemT := args[0].(type) {
case value.StringValue:
val = itemT.Val()
case value.Slice:
if itemT.Len() == 0 {
return nil, false
}
val = itemT.SliceValue()[0].ToString()
}
if val == "" {
return nil, false
}
/*
fmt.Printf("%v\n", ua.Mobile()) // => false
fmt.Printf("%v\n", ua.Bot()) // => false
fmt.Printf("%v\n", ua.Mozilla()) // => "5.0"
fmt.Printf("%v\n", ua.Platform()) // => "X11"
fmt.Printf("%v\n", ua.OS()) // => "Linux x86_64"
name, version := ua.Engine()
fmt.Printf("%v\n", name) // => "AppleWebKit"
fmt.Printf("%v\n", version) // => "537.11"
name, version = ua.Browser()
fmt.Printf("%v\n", name) // => "Chrome"
fmt.Printf("%v\n", version) // => "23.0.1271.97"
// Let's see an example with a bot.
ua.Parse("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
fmt.Printf("%v\n", ua.Bot()) // => true
name, version = ua.Browser()
fmt.Printf("%v\n", name) // => Googlebot
fmt.Printf("%v\n", version) // => 2.1
*/
ua := user_agent.New(val)
out := make(map[string]string)
out["bot"] = fmt.Sprintf("%v", ua.Bot())
out["mobile"] = fmt.Sprintf("%v", ua.Mobile())
out["mozilla"] = ua.Mozilla()
out["platform"] = ua.Platform()
out["os"] = ua.OS()
name, version := ua.Engine()
out["engine"] = name
out["engine_version"] = version
name, version = ua.Browser()
out["browser"] = name
out["browser_version"] = version
return value.NewMapStringValue(out), true
}