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| 1 | +package client |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "context" |
| 6 | + "encoding/json" |
| 7 | + "fmt" |
| 8 | + "io" |
| 9 | + "io/ioutil" |
| 10 | + "net/http" |
| 11 | + "strconv" |
| 12 | +) |
| 13 | + |
| 14 | +type service struct { |
| 15 | + client *Client |
| 16 | +} |
| 17 | + |
| 18 | +// Client is the campay API client. |
| 19 | +// Do not instantiate this client with Client{}. Use the New method instead. |
| 20 | +type Client struct { |
| 21 | + httpClient *http.Client |
| 22 | + common service |
| 23 | + baseURL string |
| 24 | + delay int |
| 25 | + |
| 26 | + Status *statusService |
| 27 | +} |
| 28 | + |
| 29 | +// New creates and returns a new campay.Client from a slice of campay.ClientOption. |
| 30 | +func New(options ...Option) *Client { |
| 31 | + config := defaultClientConfig() |
| 32 | + |
| 33 | + for _, option := range options { |
| 34 | + option.apply(config) |
| 35 | + } |
| 36 | + |
| 37 | + client := &Client{ |
| 38 | + httpClient: config.httpClient, |
| 39 | + delay: config.delay, |
| 40 | + baseURL: config.baseURL, |
| 41 | + } |
| 42 | + |
| 43 | + client.common.client = client |
| 44 | + client.Status = (*statusService)(&client.common) |
| 45 | + return client |
| 46 | +} |
| 47 | + |
| 48 | +// newRequest creates an API request. A relative URL can be provided in uri, |
| 49 | +// in which case it is resolved relative to the BaseURL of the Client. |
| 50 | +// URI's should always be specified without a preceding slash. |
| 51 | +func (client *Client) newRequest(ctx context.Context, method, uri string, body interface{}) (*http.Request, error) { |
| 52 | + var buf io.ReadWriter |
| 53 | + if body != nil { |
| 54 | + buf = &bytes.Buffer{} |
| 55 | + enc := json.NewEncoder(buf) |
| 56 | + enc.SetEscapeHTML(false) |
| 57 | + err := enc.Encode(body) |
| 58 | + if err != nil { |
| 59 | + return nil, err |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + req, err := http.NewRequestWithContext(ctx, method, client.baseURL+uri, buf) |
| 64 | + if err != nil { |
| 65 | + return nil, err |
| 66 | + } |
| 67 | + |
| 68 | + req.Header.Set("Content-Type", "application/json") |
| 69 | + req.Header.Set("Accept", "application/json") |
| 70 | + |
| 71 | + if client.delay > 0 { |
| 72 | + client.addURLParams(req, map[string]string{"sleep": strconv.Itoa(client.delay)}) |
| 73 | + } |
| 74 | + |
| 75 | + return req, nil |
| 76 | +} |
| 77 | + |
| 78 | +// addURLParams adds urls parameters to an *http.Request |
| 79 | +func (client *Client) addURLParams(request *http.Request, params map[string]string) *http.Request { |
| 80 | + q := request.URL.Query() |
| 81 | + for key, value := range params { |
| 82 | + q.Add(key, value) |
| 83 | + } |
| 84 | + request.URL.RawQuery = q.Encode() |
| 85 | + return request |
| 86 | +} |
| 87 | + |
| 88 | +// do carries out an HTTP request and returns a Response |
| 89 | +func (client *Client) do(req *http.Request) (*Response, error) { |
| 90 | + if req == nil { |
| 91 | + return nil, fmt.Errorf("%T cannot be nil", req) |
| 92 | + } |
| 93 | + |
| 94 | + httpResponse, err := client.httpClient.Do(req) |
| 95 | + if err != nil { |
| 96 | + return nil, err |
| 97 | + } |
| 98 | + |
| 99 | + defer func() { _ = httpResponse.Body.Close() }() |
| 100 | + |
| 101 | + resp, err := client.newResponse(httpResponse) |
| 102 | + if err != nil { |
| 103 | + return resp, err |
| 104 | + } |
| 105 | + |
| 106 | + _, err = io.Copy(ioutil.Discard, httpResponse.Body) |
| 107 | + if err != nil { |
| 108 | + return resp, err |
| 109 | + } |
| 110 | + |
| 111 | + return resp, nil |
| 112 | +} |
| 113 | + |
| 114 | +// newResponse converts an *http.Response to *Response |
| 115 | +func (client *Client) newResponse(httpResponse *http.Response) (*Response, error) { |
| 116 | + if httpResponse == nil { |
| 117 | + return nil, fmt.Errorf("%T cannot be nil", httpResponse) |
| 118 | + } |
| 119 | + |
| 120 | + resp := new(Response) |
| 121 | + resp.HTTPResponse = httpResponse |
| 122 | + |
| 123 | + buf, err := ioutil.ReadAll(resp.HTTPResponse.Body) |
| 124 | + if err != nil { |
| 125 | + return nil, err |
| 126 | + } |
| 127 | + resp.Body = &buf |
| 128 | + |
| 129 | + return resp, resp.Error() |
| 130 | +} |
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