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- // Package writeas provides the binding for the Write.as API
- package writeas
-
- import (
- "bytes"
- "encoding/json"
- "fmt"
- "github.com/writeas/impart"
- "io"
- "net/http"
- "time"
- )
-
- const (
- apiURL = "https://write.as/api"
- )
-
- // Client is used to interact with the Write.as API. It can be used to make
- // authenticated or unauthenticated calls.
- type Client struct {
- baseURL string
-
- // Access token for the user making requests.
- token string
- // Client making requests to the API
- client *http.Client
- }
-
- // defaultHTTPTimeout is the default http.Client timeout.
- const defaultHTTPTimeout = 10 * time.Second
-
- // NewClient creates a new API client. By default, all requests are made
- // unauthenticated. To optionally make authenticated requests, call `SetToken`.
- //
- // c := writeas.NewClient()
- // c.SetToken("00000000-0000-0000-0000-000000000000")
- func NewClient() *Client {
- return &Client{
- client: &http.Client{Timeout: defaultHTTPTimeout},
- baseURL: apiURL,
- }
- }
-
- // SetToken sets the user token for all future Client requests. Setting this to
- // an empty string will change back to unauthenticated requests.
- func (c *Client) SetToken(token string) {
- c.token = token
- }
-
- func (c *Client) get(path string, r interface{}) (*impart.Envelope, error) {
- method := "GET"
- if method != "GET" && method != "HEAD" {
- return nil, fmt.Errorf("Method %s not currently supported by library (only HEAD and GET).\n", method)
- }
-
- return c.request(method, path, nil, r)
- }
-
- func (c *Client) post(path string, data, r interface{}) (*impart.Envelope, error) {
- b := new(bytes.Buffer)
- json.NewEncoder(b).Encode(data)
- return c.request("POST", path, b, r)
- }
-
- func (c *Client) put(path string, data, r interface{}) (*impart.Envelope, error) {
- b := new(bytes.Buffer)
- json.NewEncoder(b).Encode(data)
- return c.request("PUT", path, b, r)
- }
-
- func (c *Client) delete(path string, data map[string]string) (*impart.Envelope, error) {
- r, err := c.buildRequest("DELETE", path, nil)
- if err != nil {
- return nil, err
- }
-
- q := r.URL.Query()
- for k, v := range data {
- q.Add(k, v)
- }
- r.URL.RawQuery = q.Encode()
-
- return c.doRequest(r, nil)
- }
-
- func (c *Client) request(method, path string, data io.Reader, result interface{}) (*impart.Envelope, error) {
- r, err := c.buildRequest(method, path, data)
- if err != nil {
- return nil, err
- }
-
- return c.doRequest(r, result)
- }
-
- func (c *Client) buildRequest(method, path string, data io.Reader) (*http.Request, error) {
- url := fmt.Sprintf("%s%s", c.baseURL, path)
- r, err := http.NewRequest(method, url, data)
- if err != nil {
- return nil, fmt.Errorf("Create request: %v", err)
- }
- c.prepareRequest(r)
-
- return r, nil
- }
-
- func (c *Client) doRequest(r *http.Request, result interface{}) (*impart.Envelope, error) {
- resp, err := c.client.Do(r)
- if err != nil {
- return nil, fmt.Errorf("Request: %v", err)
- }
- defer resp.Body.Close()
-
- env := &impart.Envelope{
- Code: resp.StatusCode,
- }
- if result != nil {
- env.Data = result
-
- err = json.NewDecoder(resp.Body).Decode(&env)
- if err != nil {
- return nil, err
- }
- }
-
- return env, nil
- }
-
- func (c *Client) prepareRequest(r *http.Request) {
- r.Header.Add("User-Agent", "go-writeas v1")
- r.Header.Add("Content-Type", "application/json")
- if c.token != "" {
- r.Header.Add("Authorization", "Token "+c.token)
- }
- }
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