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Fix minor metrics bugs and refactor route implementation

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jeff
2018-06-16 16:55:39 +08:00
committed by jeff
parent 28dbcc797b
commit 18932ed1d8
429 changed files with 32117 additions and 3988 deletions
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vendor/github.com/antonholmquist/jason/.gitignore generated vendored Normal file
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.DS_Store

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language: go
go:
- 1.1
- 1.2
- 1.3
- tip

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The MIT License (MIT)
Copyright (c) 2014 Anton Holmquist, anton.holmquist@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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![logo](https://us-bucket-host.s3.amazonaws.com/jason/jason_cropped_4.svg)
Jason is an easy-to-use JSON library for Go.
[![Build Status](https://img.shields.io/travis/antonholmquist/jason.svg?style=flat)](https://travis-ci.org/antonholmquist/jason) [![Godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/github.com/antonholmquist/jason) [![license](http://img.shields.io/badge/license-MIT-red.svg?style=flat)](https://raw.githubusercontent.com/antonholmquist/jason/master/LICENSE)
# About
Jason is designed to be convenient for reading arbitrary JSON while still honoring the strictness of the language. Inspired by other libraries and improved to work well for common use cases. It currently focuses on reading JSON data rather than creating it. [API Documentation](http://godoc.org/github.com/antonholmquist/jason) can be found on godoc.org.
## Install
```shell
go get github.com/antonholmquist/jason
```
## Import
```go
import (
"github.com/antonholmquist/jason"
)
```
## Data types
The following golang values are used to represent JSON data types. It is consistent with how `encoding/json` uses primitive types.
- `bool`, for JSON booleans
- `json.Number/float64/int64`, for JSON numbers
- `string`, for JSON strings
- `[]*Value`, for JSON arrays
- `map[string]*Value`, for JSON objects
- `nil` for JSON null
## Examples
### Create from bytes
Create object from bytes. Returns an error if the bytes are not valid JSON.
```go
v, err := jason.NewObjectFromBytes(b)
```
If the root object is not an array, use this method instead. It can then be cased to the expected type with one of the As-Methods.
```go
v, err := jason.NewValueFromBytes(b)
```
### Create from a reader (like a http response)
Create value from a io.reader. Returns an error if the string couldn't be parsed.
```go
v, err := jason.NewObjectFromReader(res.Body)
```
### Read values
Reading values is easy. If the key path is invalid or type doesn't match, it will return an error and the default value.
```go
name, err := v.GetString("name")
age, err := v.GetInt64("age")
verified, err := v.GetBoolean("verified")
education, err := v.GetObject("education")
friends, err := v.GetObjectArray("friends")
interests, err := v.GetStringArray("interests")
```
### Read nested values
Reading nested values is easy. If the path is invalid or type doesn't match, it will return the default value and an error.
```go
name, err := v.GetString("person", "name")
age, err := v.GetInt64("person", "age")
verified, err := v.GetBoolean("person", "verified")
education, err := v.GetObject("person", "education")
friends, err := v.GetObjectArray("person", "friends")
```
### Loop through array
Looping through an array is done with `GetValueArray()` or `GetObjectArray()`. It returns an error if the value at that keypath is null (or something else than an array).
```go
friends, err := person.GetObjectArray("friends")
for _, friend := range friends {
name, err := friend.GetString("name")
age, err := friend.GetNumber("age")
}
```
### Loop through object
Looping through an object is easy. `GetObject()` returns an error if the value at that keypath is null (or something else than an object).
```go
person, err := person.GetObject("person")
for key, value := range person.Map() {
...
}
```
## Sample App
Example project:
```go
package main
import (
"github.com/antonholmquist/jason"
"log"
)
func main() {
exampleJSON := `{
"name": "Walter White",
"age": 51,
"children": [
"junior",
"holly"
],
"other": {
"occupation": "chemist",
"years": 23
}
}`
v, _ := jason.NewObjectFromBytes([]byte(exampleJSON))
name, _ := v.GetString("name")
age, _ := v.GetNumber("age")
occupation, _ := v.GetString("other", "occupation")
years, _ := v.GetNumber("other", "years")
log.Println("age:", age)
log.Println("name:", name)
log.Println("occupation:", occupation)
log.Println("years:", years)
children, _ := v.GetStringArray("children")
for i, child := range children {
log.Printf("child %d: %s", i, child)
}
others, _ := v.GetObject("other")
for _, value := range others.Map() {
s, sErr := value.String()
n, nErr := value.Number()
if sErr == nil {
log.Println("string value: ", s)
} else if nErr == nil {
log.Println("number value: ", n)
}
}
}
```
## Documentation
Documentation can be found a godoc:
https://godoc.org/github.com/antonholmquist/jason
## Test
To run the project tests:
```shell
go test
```
## Compatibility
Go 1.1 and up.
## Where does the name come from?
I remebered it from an email one of our projects managers sent a couple of years ago.
> "Don't worry. We can handle both XML and Jason"
## Author
Anton Holmquist, http://twitter.com/antonholmquist

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// Use of this source code is governed by a
// license that can be found in the LICENSE file.
// Jason is designed to be convenient for reading arbitrary JSON while still honoring the strictness of the language.
// Inspired by other libraries and improved to work well for common use cases.
// It currently focuses on reading JSON data rather than creating it.
//
// Examples
//
// JSON is a commonly used data transfer format, so usually the data you want to read comes either as bytes or as an io.Reader.
//
// Create an object from bytes:
// v, err := jason.NewObjectFromBytes(b)
// .. or from a net/http response body:
// v, err := jason.NewObjectFromReader(res.body)
//
// Read values
//
// Reading values is done with Get<Type>(keys ...) or the generic Get(keys ...).
// If the key path is invalid or the type doesn't match, it will return an error and the default value.
//
// name, err := v.GetString("name")
// age, err := v.GetNumber("age")
// verified, err := v.GetBoolean("verified")
// education, err := v.GetObject("education")
// friends, err := v.GetObjectArray("friends")
//
// Loop through array
//
// Getting an array is done by Get<Type>Array() or the generic GetValueArray(). It returns an error if the value at that keypath is null (or something else than the type).
//
// friends, err := person.GetObjectArray("friends")
// for _, friend := range friends {
// name, err := friend.GetString("name")
// age, err := friend.GetNumber("age")
// }
//
// Loop through keys of object
//
// Looping through an object is done by first getting it with `GetObject()` and then range on the Map().
// The GetObject() method returns an error if the value at that keypath is null (or something else than an object).
//
// person, err := person.GetObject("person")
// for key, value := range person.Map() {
// ...
// }
package jason
import (
"bytes"
"encoding/json"
"errors"
"io"
)
// Value represents an arbitrary JSON value.
// It may contain a bool, number, string, object, array or null.
type Value struct {
data interface{}
exists bool // Used to separate nil and non-existing values
}
// Object represents an object JSON object.
// It inherets from Value but with an additional method to access
// a map representation of it's content. It's useful when iterating.
type Object struct {
Value
m map[string]*Value
valid bool
}
// Returns the golang map.
// Needed when iterating through the values of the object.
func (v *Object) Map() map[string]*Value {
return v.m
}
// Creates a new value from an io.reader.
// Returns an error if the reader does not contain valid json.
// Useful for parsing the body of a net/http response.
// Example: NewFromReader(res.Body)
func NewValueFromReader(reader io.Reader) (*Value, error) {
j := new(Value)
d := json.NewDecoder(reader)
d.UseNumber()
err := d.Decode(&j.data)
return j, err
}
// Creates a new value from bytes.
// Returns an error if the bytes are not valid json.
func NewValueFromBytes(b []byte) (*Value, error) {
r := bytes.NewReader(b)
return NewValueFromReader(r)
}
func objectFromValue(v *Value, err error) (*Object, error) {
if err != nil {
return nil, err
}
o, err := v.Object()
if err != nil {
return nil, err
}
return o, nil
}
func NewObjectFromBytes(b []byte) (*Object, error) {
return objectFromValue(NewValueFromBytes(b))
}
func NewObjectFromReader(reader io.Reader) (*Object, error) {
return objectFromValue(NewValueFromReader(reader))
}
// Marshal into bytes.
func (v *Value) Marshal() ([]byte, error) {
return json.Marshal(v.data)
}
// Private Get
func (v *Value) get(key string) (*Value, error) {
// Assume this is an object
obj, err := v.Object()
if err == nil {
child, ok := obj.Map()[key]
if ok {
return child, nil
} else {
return nil, errors.New("key not found")
}
}
return nil, err
}
// Private get path
func (v *Value) getPath(keys []string) (*Value, error) {
current := v
var err error
for _, key := range keys {
current, err = current.get(key)
if err != nil {
return nil, err
}
}
return current, nil
}
// Gets the value at key path.
// Returns error if the value does not exist.
// Consider using the more specific Get<Type>(..) methods instead.
// Example:
// value, err := GetValue("address", "street")
func (v *Object) GetValue(keys ...string) (*Value, error) {
return v.getPath(keys)
}
// Gets the value at key path and attempts to typecast the value into an object.
// Returns error if the value is not a json object.
// Example:
// object, err := GetObject("person", "address")
func (v *Object) GetObject(keys ...string) (*Object, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
obj, err := child.Object()
if err != nil {
return nil, err
} else {
return obj, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into a string.
// Returns error if the value is not a json string.
// Example:
// string, err := GetString("address", "street")
func (v *Object) GetString(keys ...string) (string, error) {
child, err := v.getPath(keys)
if err != nil {
return "", err
} else {
return child.String()
}
return "", nil
}
// Gets the value at key path and attempts to typecast the value into null.
// Returns error if the value is not json null.
// Example:
// err := GetNull("address", "street")
func (v *Object) GetNull(keys ...string) error {
child, err := v.getPath(keys)
if err != nil {
return err
}
return child.Null()
}
// Gets the value at key path and attempts to typecast the value into a number.
// Returns error if the value is not a json number.
// Example:
// n, err := GetNumber("address", "street_number")
func (v *Object) GetNumber(keys ...string) (json.Number, error) {
child, err := v.getPath(keys)
if err != nil {
return "", err
} else {
n, err := child.Number()
if err != nil {
return "", err
} else {
return n, nil
}
}
return "", nil
}
// Gets the value at key path and attempts to typecast the value into a float64.
// Returns error if the value is not a json number.
// Example:
// n, err := GetNumber("address", "street_number")
func (v *Object) GetFloat64(keys ...string) (float64, error) {
child, err := v.getPath(keys)
if err != nil {
return 0, err
} else {
n, err := child.Float64()
if err != nil {
return 0, err
} else {
return n, nil
}
}
return 0, nil
}
// Gets the value at key path and attempts to typecast the value into a float64.
// Returns error if the value is not a json number.
// Example:
// n, err := GetNumber("address", "street_number")
func (v *Object) GetInt64(keys ...string) (int64, error) {
child, err := v.getPath(keys)
if err != nil {
return 0, err
} else {
n, err := child.Int64()
if err != nil {
return 0, err
} else {
return n, nil
}
}
return 0, nil
}
// Gets the value at key path and attempts to typecast the value into a bool.
// Returns error if the value is not a json boolean.
// Example:
// married, err := GetBoolean("person", "married")
func (v *Object) GetBoolean(keys ...string) (bool, error) {
child, err := v.getPath(keys)
if err != nil {
return false, err
}
return child.Boolean()
}
// Gets the value at key path and attempts to typecast the value into an array.
// Returns error if the value is not a json array.
// Consider using the more specific Get<Type>Array() since it may reduce later type casts.
// Example:
// friends, err := GetValueArray("person", "friends")
// for i, friend := range friends {
// ... // friend will be of type Value here
// }
func (v *Object) GetValueArray(keys ...string) ([]*Value, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
return child.Array()
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of objects.
// Returns error if the value is not a json array or if any of the contained objects are not objects.
// Example:
// friends, err := GetObjectArray("person", "friends")
// for i, friend := range friends {
// ... // friend will be of type Object here
// }
func (v *Object) GetObjectArray(keys ...string) ([]*Object, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]*Object, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.
Object()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of string.
// Returns error if the value is not a json array or if any of the contained objects are not strings.
// Gets the value at key path and attempts to typecast the value into an array of objects.
// Returns error if the value is not a json array or if any of the contained objects are not objects.
// Example:
// friendNames, err := GetStringArray("person", "friend_names")
// for i, friendName := range friendNames {
// ... // friendName will be of type string here
// }
func (v *Object) GetStringArray(keys ...string) ([]string, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]string, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.String()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of numbers.
// Returns error if the value is not a json array or if any of the contained objects are not numbers.
// Example:
// friendAges, err := GetNumberArray("person", "friend_ages")
// for i, friendAge := range friendAges {
// ... // friendAge will be of type float64 here
// }
func (v *Object) GetNumberArray(keys ...string) ([]json.Number, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]json.Number, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.Number()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of floats.
// Returns error if the value is not a json array or if any of the contained objects are not numbers.
func (v *Object) GetFloat64Array(keys ...string) ([]float64, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]float64, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.Float64()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of ints.
// Returns error if the value is not a json array or if any of the contained objects are not numbers.
func (v *Object) GetInt64Array(keys ...string) ([]int64, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]int64, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.Int64()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of bools.
// Returns error if the value is not a json array or if any of the contained objects are not booleans.
func (v *Object) GetBooleanArray(keys ...string) ([]bool, error) {
child, err := v.getPath(keys)
if err != nil {
return nil, err
} else {
array, err := child.Array()
if err != nil {
return nil, err
} else {
typedArray := make([]bool, len(array))
for index, arrayItem := range array {
typedArrayItem, err := arrayItem.Boolean()
if err != nil {
return nil, err
} else {
typedArray[index] = typedArrayItem
}
}
return typedArray, nil
}
}
return nil, nil
}
// Gets the value at key path and attempts to typecast the value into an array of nulls.
// Returns length, or an error if the value is not a json array or if any of the contained objects are not nulls.
func (v *Object) GetNullArray(keys ...string) (int64, error) {
child, err := v.getPath(keys)
if err != nil {
return 0, err
} else {
array, err := child.Array()
if err != nil {
return 0, err
} else {
var length int64 = 0
for _, arrayItem := range array {
err := arrayItem.Null()
if err != nil {
return 0, err
} else {
length++
}
}
return length, nil
}
}
return 0, nil
}
// Returns an error if the value is not actually null
func (v *Value) Null() error {
var valid bool
// Check the type of this data
switch v.data.(type) {
case nil:
valid = v.exists // Valid only if j also exists, since other values could possibly also be nil
break
}
if valid {
return nil
}
return errors.New("is not null")
}
// Attempts to typecast the current value into an array.
// Returns error if the current value is not a json array.
// Example:
// friendsArray, err := friendsValue.Array()
func (v *Value) Array() ([]*Value, error) {
var valid bool
// Check the type of this data
switch v.data.(type) {
case []interface{}:
valid = true
break
}
// Unsure if this is a good way to use slices, it's probably not
var slice []*Value
if valid {
for _, element := range v.data.([]interface{}) {
child := Value{element, true}
slice = append(slice, &child)
}
return slice, nil
}
return slice, errors.New("Not an array")
}
// Attempts to typecast the current value into a number.
// Returns error if the current value is not a json number.
// Example:
// ageNumber, err := ageValue.Number()
func (v *Value) Number() (json.Number, error) {
var valid bool
// Check the type of this data
switch v.data.(type) {
case json.Number:
valid = true
break
}
if valid {
return v.data.(json.Number), nil
}
return "", errors.New("not a number")
}
// Attempts to typecast the current value into a float64.
// Returns error if the current value is not a json number.
// Example:
// percentage, err := v.Float64()
func (v *Value) Float64() (float64, error) {
n, err := v.Number()
if err != nil {
return 0, err
}
return n.Float64()
}
// Attempts to typecast the current value into a int64.
// Returns error if the current value is not a json number.
// Example:
// id, err := v.Int64()
func (v *Value) Int64() (int64, error) {
n, err := v.Number()
if err != nil {
return 0, err
}
return n.Int64()
}
// Attempts to typecast the current value into a bool.
// Returns error if the current value is not a json boolean.
// Example:
// marriedBool, err := marriedValue.Boolean()
func (v *Value) Boolean() (bool, error) {
var valid bool
// Check the type of this data
switch v.data.(type) {
case bool:
valid = true
break
}
if valid {
return v.data.(bool), nil
}
return false, errors.New("no bool")
}
// Attempts to typecast the current value into an object.
// Returns error if the current value is not a json object.
// Example:
// friendObject, err := friendValue.Object()
func (v *Value) Object() (*Object, error) {
var valid bool
// Check the type of this data
switch v.data.(type) {
case map[string]interface{}:
valid = true
break
}
if valid {
obj := new(Object)
obj.valid = valid
m := make(map[string]*Value)
if valid {
for key, element := range v.data.(map[string]interface{}) {
m[key] = &Value{element, true}
}
}
obj.data = v.data
obj.m = m
return obj, nil
}
return nil, errors.New("not an object")
}
// Attempts to typecast the current value into a string.
// Returns error if the current value is not a json string
// Example:
// nameObject, err := nameValue.String()
func (v *Value) String() (string, error) {
var valid bool
// Check the type of this data
switch v.data.(type) {
case string:
valid = true
break
}
if valid {
return v.data.(string), nil
}
return "", errors.New("not a string")
}
// Returns the value a json formatted string.
// Note: The method named String() is used by golang's log method for logging.
// Example:
func (v *Object) String() string {
f, err := json.Marshal(v.data)
if err != nil {
return err.Error()
}
return string(f)
}