README
¶
graphql 
Low-level GraphQL client for Go.
- Simple, familiar API
- Respects
context.Contexttimeouts and cancellation - Build and execute any kind of GraphQL request
- Use strong Go types for response data
- Use variables and upload files
- Simple error handling
Installation
Make sure you have a working Go environment. To install graphql, simply run:
$ go get github.com/machinebox/graphql
Usage
import "context"
// create a client (safe to share across requests)
client := graphql.NewClient("https://machinebox.io/graphql")
// make a request
req := graphql.NewRequest(`
query ($key: String!) {
items (id:$key) {
field1
field2
field3
}
}
`)
// set any variables
req.Var("key", "value")
// set header fields
req.Header.Set("Cache-Control", "no-cache")
// define a Context for the request
ctx := context.Background()
// run it and capture the response
var respData ResponseStruct
if err := client.Run(ctx, req, &respData); err != nil {
log.Fatal(err)
}
File support via multipart form data
By default, the package will send a JSON body. To enable the sending of files, you can opt to
use multipart form data instead using the UseMultipartForm option when you create your Client:
client := graphql.NewClient("https://machinebox.io/graphql", graphql.UseMultipartForm())
For more information, read the godoc package documentation or the blog post.
Thanks
Thanks to Chris Broadfoot for design help.
Documentation
¶
Overview ¶
Package graphql provides a low level GraphQL client.
// create a client (safe to share across requests)
client := graphql.NewClient("https://machinebox.io/graphql")
// make a request
req := graphql.NewRequest(`
query ($key: String!) {
items (id:$key) {
field1
field2
field3
}
}
`)
// set any variables
req.Var("key", "value")
// run it and capture the response
var respData ResponseStruct
if err := client.Run(ctx, req, &respData); err != nil {
log.Fatal(err)
}
Specify client ¶
To specify your own http.Client, use the WithHTTPClient option:
httpclient := &http.Client{}
client := graphql.NewClient("https://machinebox.io/graphql", graphql.WithHTTPClient(httpclient))
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Client ¶ added in v0.2.0
type Client struct {
// Log is called with various debug information.
// To log to standard out, use:
// client.Log = func(s string) { log.Println(s) }
Log func(s string)
// contains filtered or unexported fields
}
Client is a client for interacting with a GraphQL API.
func NewClient ¶ added in v0.2.0
func NewClient(endpoint string, opts ...ClientOption) *Client
NewClient makes a new Client capable of making GraphQL requests.
func (*Client) Run ¶ added in v0.2.0
Run executes the query and unmarshals the response from the data field into the response object. Pass in a nil response object to skip response parsing. If the request fails or the server returns an error, the first error will be returned.
type ClientOption ¶ added in v0.2.0
type ClientOption func(*Client)
ClientOption are functions that are passed into NewClient to modify the behaviour of the Client.
func UseMultipartForm ¶ added in v0.2.2
func UseMultipartForm() ClientOption
UseMultipartForm uses multipart/form-data and activates support for files.
func WithHTTPClient ¶ added in v0.2.0
func WithHTTPClient(httpclient *http.Client) ClientOption
WithHTTPClient specifies the underlying http.Client to use when making requests.
NewClient(endpoint, WithHTTPClient(specificHTTPClient))
type Request ¶
type Request struct {
// Header represent any request headers that will be set
// when the request is made.
Header http.Header
// contains filtered or unexported fields
}
Request is a GraphQL request.
func NewRequest ¶
NewRequest makes a new Request with the specified string.
func (*Request) File ¶
File sets a file to upload. Files are only supported with a Client that was created with the UseMultipartForm option.
Source Files
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- graphql.go