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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| package graphql | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/goccy/go-json" | ||
| "github.com/valyala/fasthttp" | ||
| "net/http" | ||
| "time" | ||
| ) | ||
|
|
||
| // Client is a client for interacting with a GraphQL API. | ||
| type Client struct { | ||
| endpoint string | ||
| httpClient *fasthttp.Client | ||
| } | ||
|
|
||
| // NewClient makes a new Client capable of making GraphQL requests. | ||
| func NewClient(endpoint string) *Client { | ||
| return &Client{ | ||
| endpoint: endpoint, | ||
| httpClient: &fasthttp.Client{StreamResponseBody: false}, | ||
| } | ||
| } | ||
|
|
||
| // 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. | ||
| func (c *Client) Run(req *Request, resp interface{}, timeout time.Duration) error { | ||
| requestBodyObj := internalRequest{ | ||
| Query: req.q, | ||
| Variables: req.vars, | ||
| } | ||
|
|
||
| requestBody, err := json.Marshal(requestBodyObj) | ||
| if err != nil { | ||
| return fmt.Errorf("encode body: %w", err) | ||
| } | ||
|
|
||
| gr := &graphResponse{ | ||
| Data: resp, | ||
| } | ||
|
|
||
| r := fasthttp.AcquireRequest() | ||
| r.Header.SetMethod(fasthttp.MethodPost) | ||
| r.SetRequestURI(c.endpoint) | ||
| r.SetBodyRaw(requestBody) | ||
|
|
||
| r.Header.SetContentType("application/json; charset=utf-8") | ||
| r.Header.Set("Accept", "application/json; charset=utf-8") | ||
|
|
||
| for key, values := range req.Header { | ||
| for _, value := range values { | ||
| r.Header.Add(key, value) | ||
| } | ||
| } | ||
|
|
||
| res := fasthttp.AcquireResponse() | ||
|
|
||
| if err := c.httpClient.DoTimeout(r, res, timeout); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| fasthttp.ReleaseRequest(r) | ||
| defer fasthttp.ReleaseResponse(res) | ||
|
|
||
| if err := json.Unmarshal(res.Body(), &gr); err != nil { | ||
| return fmt.Errorf("decoding response: %w", err) | ||
| } | ||
|
|
||
| if len(gr.Errors) > 0 { | ||
| // return first error | ||
| return gr.Errors[0] | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| type internalRequest struct { | ||
| Query string `json:"query"` | ||
| Variables map[string]interface{} `json:"variables"` | ||
| } | ||
|
|
||
| type graphErr struct { | ||
| Message string | ||
| } | ||
|
|
||
| func (e graphErr) Error() string { | ||
| return "graphql: " + e.Message | ||
| } | ||
|
|
||
| type graphResponse struct { | ||
| Data interface{} | ||
| Errors []graphErr | ||
| } | ||
|
|
||
| // Request is a GraphQL request. | ||
| type Request struct { | ||
| q string | ||
| vars map[string]interface{} | ||
|
|
||
| // Header represent any request headers that will be set | ||
| // when the request is made. | ||
| Header http.Header | ||
| } | ||
|
|
||
| // NewRequest makes a new Request with the specified string. | ||
| func NewRequest(q string) *Request { | ||
| return &Request{ | ||
| q: q, | ||
| Header: make(map[string][]string), | ||
| } | ||
| } | ||
|
|
||
| // Var sets a variable. | ||
| func (req *Request) Var(key string, value interface{}) { | ||
| if req.vars == nil { | ||
| req.vars = make(map[string]interface{}) | ||
| } | ||
| req.vars[key] = value | ||
| } | ||
|
|
||
| // Vars gets the variables for this Request. | ||
| func (req *Request) Vars() map[string]interface{} { | ||
| return req.vars | ||
| } | ||
|
|
||
| // Query gets the query string of this request. | ||
| func (req *Request) Query() string { | ||
| return req.q | ||
| } |
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