96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
package opensea
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/log"
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)
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const requestTimeout = 5 * time.Second
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const getRequestRetryMaxCount = 15
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const getRequestWaitTime = 300 * time.Millisecond
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type HTTPClient struct {
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client *http.Client
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getRequestLock sync.RWMutex
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}
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func NewHTTPClient() *HTTPClient {
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return &HTTPClient{
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client: &http.Client{
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Timeout: requestTimeout,
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},
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}
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}
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func (o *HTTPClient) doGetRequest(url string, apiKey string) ([]byte, error) {
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// Ensure only one thread makes a request at a time
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o.getRequestLock.Lock()
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defer o.getRequestLock.Unlock()
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retryCount := 0
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statusCode := http.StatusOK
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// Try to do the request without an apiKey first
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tmpAPIKey := ""
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for {
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req, err := http.NewRequest(http.MethodGet, url, 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.Set("Content-Type", "application/json")
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req.Header.Set("User-Agent", "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0")
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if len(tmpAPIKey) > 0 {
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req.Header.Set("X-API-KEY", tmpAPIKey)
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}
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resp, err := o.client.Do(req)
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if err != nil {
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return nil, err
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}
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defer func() {
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if err := resp.Body.Close(); err != nil {
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log.Error("failed to close opensea request body", "err", err)
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}
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}()
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statusCode = resp.StatusCode
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switch resp.StatusCode {
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case http.StatusOK:
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body, err := ioutil.ReadAll(resp.Body)
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return body, err
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case http.StatusBadRequest:
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// The OpenSea v2 API will return error 400 if the account holds no collectibles on
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// the requested chain. This shouldn't be treated as an error, return an empty body.
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return nil, nil
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case http.StatusTooManyRequests:
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if retryCount < getRequestRetryMaxCount {
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// sleep and retry
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time.Sleep(getRequestWaitTime)
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retryCount++
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continue
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}
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// break and error
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case http.StatusForbidden:
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// Request requires an apiKey, set it and retry
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if tmpAPIKey == "" && apiKey != "" {
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tmpAPIKey = apiKey
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// sleep and retry
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time.Sleep(getRequestWaitTime)
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continue
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}
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// break and error
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default:
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// break and error
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}
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break
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}
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return nil, fmt.Errorf("unsuccessful request: %d %s", statusCode, http.StatusText(statusCode))
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}
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