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118 lines
2.7 KiB
Go
118 lines
2.7 KiB
Go
package giphy
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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)
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// DefaultClient is the default Giphy API client
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var DefaultClient = NewClient()
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// PublicBetaKey is the public beta key for the Giphy API
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var PublicBetaKey = "dc6zaTOxFJmzC"
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// A Client communicates with the Giphy API.
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type Client struct {
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// APIKey is the key used for requests to the Giphy API
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APIKey string
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// Limit is the limit used for requests to the Giphy API
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Limit int
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// Rating is the rating used for requests to the Giphy API
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Rating string
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// BaseURL is the base url for Giphy API.
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BaseURL *url.URL
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// BasePath is the base path for the gifs endpoints
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BasePath string
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// User agent used for HTTP requests to Giphy API.
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UserAgent string
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// HTTP client used to communicate with the Giphy API.
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httpClient *http.Client
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}
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// NewClient returns a new Giphy API client.
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// If no *http.Client were provided then http.DefaultClient is used.
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func NewClient(httpClients ...*http.Client) *Client {
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var httpClient *http.Client
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if len(httpClients) > 0 && httpClients[0] != nil {
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httpClient = httpClients[0]
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} else {
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cloned := *http.DefaultClient
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httpClient = &cloned
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}
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c := &Client{
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APIKey: Env("GIPHY_API_KEY", PublicBetaKey),
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Rating: Env("GIPHY_RATING", "g"),
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Limit: EnvInt("GIPHY_LIMIT", 10),
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BaseURL: &url.URL{
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Scheme: Env("GIPHY_BASE_URL_SCHEME", "https"),
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Host: Env("GIPHY_BASE_URL_HOST", "api.giphy.com"),
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},
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BasePath: Env("GIPHY_BASE_PATH", "/v1"),
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UserAgent: Env("GIPHY_USER_AGENT", "giphy.go"),
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httpClient: httpClient,
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}
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return c
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}
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// NewRequest creates an API request.
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func (c *Client) NewRequest(s string) (*http.Request, error) {
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rel, err := url.Parse(c.BasePath + s)
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if err != nil {
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return nil, err
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}
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q := rel.Query()
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q.Set("api_key", c.APIKey)
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q.Set("rating", c.Rating)
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rel.RawQuery = q.Encode()
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u := c.BaseURL.ResolveReference(rel)
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if EnvBool("GIPHY_VERBOSE", false) {
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fmt.Println("giphy: GET", u.String())
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}
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req, err := http.NewRequest("GET", u.String(), nil)
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if err != nil {
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return nil, err
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}
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req.Header.Add("User-Agent", c.UserAgent)
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return req, nil
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}
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// Do sends an API request and returns the API response. The API response is
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// decoded and stored in the value pointed to by v, or returned as an error if
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// an API error has occurred.
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func (c *Client) Do(req *http.Request, v interface{}) (*http.Response, error) {
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// Make sure to close the connection after replying to this request
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req.Close = true
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return resp, err
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}
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defer resp.Body.Close()
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if v != nil {
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err = json.NewDecoder(resp.Body).Decode(v)
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}
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if err != nil {
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return nil, fmt.Errorf("error reading response from %s %s: %s", req.Method, req.URL.RequestURI(), err)
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}
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return resp, nil
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}
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