/
client.go
57 lines (53 loc) · 1.26 KB
/
client.go
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package openbd
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"strings"
)
// Client for openbd.
type Client struct {
URL *url.URL
HTTPClient *http.Client
}
// NewClientV1 generates a client for openbd.
func NewClientV1(host string, cli *http.Client) (Fetcher, error) {
u, err := url.ParseRequestURI(host)
if err != nil {
return nil, err
}
u.Path = "/v1"
if cli == nil {
cli = http.DefaultClient
}
return Fetcher(&Client{
URL: u,
HTTPClient: cli,
}), nil
}
// Get book information by isbn.
func (c *Client) Get(isbn ...string) (map[string]BookInformer, error) {
if len(isbn) > 1e3 {
return nil, fmt.Errorf("opendb: args length should be under 1,000 - length = %d", len(isbn))
}
resp, err := c.HTTPClient.Get(c.URL.String() + "/get?isbn=" + strings.Join(isbn, ","))
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("opendb: faild to request - status code = %d", resp.StatusCode)
}
rs := make([]*Root, 0, len(isbn))
if err := json.NewDecoder(resp.Body).Decode(&rs); err != nil {
return nil, err
}
m := make(map[string]BookInformer, len(rs))
for i := range rs {
if rs[i] != nil {
m[rs[i].Summary.Isbn] = BookInformer(rs[i])
}
}
return m, nil
}