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ofxgo/vanguard_client.go
Aaron Lindsay 10edd94920 Vanguard client: Accept 500 errors on initial response
Though their server returns a 500 HTTP status code, it still sets the
required cookies on the response that we can use to make a second
request.
2020-11-17 10:33:48 -05:00

84 lines
2.3 KiB
Go

package ofxgo
import (
"errors"
"io"
"net/http"
"strings"
)
// VanguardClient provides a Client implementation which handles Vanguard's
// cookie-passing requirements. VanguardClient uses default, non-zero settings,
// if its fields are not initialized.
type VanguardClient struct {
*BasicClient
}
// NewVanguardClient returns a Client interface configured to handle Vanguard's
// brand of idiosyncrasy
func NewVanguardClient(bc *BasicClient) Client {
return &VanguardClient{bc}
}
// rawRequestCookies is RawRequest with the added feature of sending cookies
func rawRequestCookies(URL string, r io.Reader, cookies []*http.Cookie) (*http.Response, error) {
if !strings.HasPrefix(URL, "https://") {
return nil, errors.New("Refusing to send OFX request with possible plain-text password over non-https protocol")
}
request, err := http.NewRequest("POST", URL, r)
if err != nil {
return nil, err
}
request.Header.Set("Content-Type", "application/x-ofx")
for _, cookie := range cookies {
request.AddCookie(cookie)
}
response, err := http.DefaultClient.Do(request)
if err != nil {
return nil, err
}
if response.StatusCode != 200 {
return nil, errors.New("OFXQuery request status: " + response.Status)
}
return response, nil
}
// RequestNoParse marshals a Request to XML, makes an HTTP request, and returns
// the raw HTTP response
func (c *VanguardClient) RequestNoParse(r *Request) (*http.Response, error) {
r.SetClientFields(c)
b, err := r.Marshal()
if err != nil {
return nil, err
}
response, err := c.RawRequest(r.URL, b)
// Some financial institutions (cough, Vanguard, cough), require a cookie
// to be set on the http request, or they return empty responses.
// Fortunately, the initial response contains the cookie we need, so if we
// detect an empty response with cookies set that didn't have any errors,
// re-try the request while sending their cookies back to them.
if response != nil && response.ContentLength <= 0 && len(response.Cookies()) > 0 {
b, err = r.Marshal()
if err != nil {
return nil, err
}
return rawRequestCookies(r.URL, b, response.Cookies())
}
return response, err
}
// Request marshals a Request to XML, makes an HTTP request, and then
// unmarshals the response into a Response object.
func (c *VanguardClient) Request(r *Request) (*Response, error) {
return clientRequest(c, r)
}