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