1 files changed, 68 insertions, 0 deletions
diff --git a/bilibili/request.go b/bilibili/request.go
new file mode 100644
index 0000000..cb989a7
--- /dev/null
+++ b/bilibili/request.go
@@ -0,0 +1,68 @@
+package bilibili
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+	"strings"
+)
+
+// newRequest create an HTTP request with per-instance User-Agent set.
+func (b Bilibili) newRequest(
+	method string,
+	url string,
+	body io.Reader,
+) (req *http.Request, err error) {
+	req, err = http.NewRequestWithContext(b.ctx, method, url, body)
+	if err != nil {
+		b.error.Printf("Cannot create HTTP request instance: %v. Method: %v, URL: %v", err, method, url)
+		return
+	}
+	req.Header.Set("User-Agent", b.userAgent)
+	return
+}
+
+// newRequest create an HTTP GET request with an empty body and per-instance User-Agent set.
+func (b Bilibili) newGet(url string) (req *http.Request, err error) {
+	return b.newRequest("GET", url, strings.NewReader(""))
+}
+
+// callGet make a GET request and parse response as a JSON document with given model.
+func callGet[T BaseResponse[V], V any](b Bilibili, url string) (resp T, err error) {
+	logger := log.Default()
+	req, err := b.newGet(url)
+	if err != nil {
+		logger.Printf("ERROR: Cannot create HTTP request instance on API %v: %v", url, err)
+		return
+	}
+
+	r, err := b.http.Do(req)
+	defer func() { _ = r.Body.Close() }()
+	if err != nil {
+		logger.Printf("ERROR: HTTP Request failed on API %v: %v", url, err)
+		return
+	}
+
+	err = validateHttpStatus(r)
+	if err != nil {
+		b.error.Printf("%v", err)
+		return
+	}
+
+	data, err := io.ReadAll(r.Body)
+	if err != nil {
+		b.error.Printf("Error when reading HTTP response on API %v: %v", url, err)
+		return
+	}
+
+	err = json.Unmarshal(data, &resp)
+	if err != nil {
+		b.error.Printf("Invalid JSON body of HTTP response on API %v: %v. Text: \"%v\"",
+			url, err, string(data))
+		return
+	}
+
+	b.debug.Printf("HTTP %v, len: %v bytes, url: %v", r.StatusCode, len(data), url)
+	return
+}