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ilias.go
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ilias.go
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package ilias
import (
"bytes"
"errors"
"io"
"log"
"mime/multipart"
"net/http"
"net/http/cookiejar"
"net/textproto"
"net/url"
"strings"
"github.com/gorilla/schema"
)
var (
decoder = schema.NewDecoder()
encoder = schema.NewEncoder()
ErrCredentials = errors.New("wrong username or password")
ErrToken = errors.New("token could not be found")
ErrFullName = errors.New("full name could not be found")
ErrUpdate = errors.New("update failed")
ErrFileHash = errors.New("file hash could not be found")
)
const (
baseUrl string = "https://ilias.hhu.de/"
defaultHost string = "ilias.hhu.de"
)
type Credentials struct {
Username string
Password string
}
type Client struct {
// The current user's login name.
User *User
// Base URL for requests. Should end with a dash.
BaseURL *url.URL
// Host field set within request headers
Host string
// HTTP Client used for making requests against the ILIAS platform.
client *http.Client
common service
Auth *AuthService
Exercise *ExerciseService
Members *MemberService
}
type service struct {
client *Client
}
func NewClient(client *http.Client, credentials *Credentials) (*Client, error) {
// Create a default client if none is specified
if client == nil {
client = http.DefaultClient
}
// Attach a cookie jar to the client
jar, err := cookiejar.New(nil)
if err != nil {
log.Fatal(err)
return nil, err
}
client.Jar = jar
// Parse the base url and create the http client
base, _ := url.Parse(baseUrl)
ret := &Client{ BaseURL: base, Host: defaultHost, client: client }
ret.common.client = ret
ret.Auth = (*AuthService)(&ret.common)
ret.Exercise = (*ExerciseService)(&ret.common)
ret.Members = (*MemberService)(&ret.common)
// Login using the client
user, err := ret.Auth.Login(credentials.Username, credentials.Password)
if err != nil {
return nil, err
}
ret.User = user
return ret, nil
}
func (c *Client) NewRequest(method string, path string, body url.Values) (*http.Request, error) {
target, err := c.BaseURL.Parse(path)
if err != nil {
return nil, err
}
// https://github.com/golang/go/issues/32897
var request *http.Request
if body != nil {
request, err = http.NewRequest(method, target.String(), strings.NewReader(body.Encode()))
} else {
request, err = http.NewRequest(method, target.String(), nil)
}
if err != nil {
return nil, err
}
if body != nil {
request.Header.Set("content-type", "application/x-www-form-urlencoded")
}
request.Host = c.Host
return request, nil
}
type UploadFile struct {
Header textproto.MIMEHeader
Content *bytes.Buffer
}
func (c *Client) NewMultipartRequest(method string, path string, body url.Values, upload *UploadFile) (*http.Request, error) {
target, err := c.BaseURL.Parse(path)
if err != nil {
return nil, err
}
var buf bytes.Buffer
writer := multipart.NewWriter(&buf)
// Create form field for the file
fieldWriter, err := writer.CreatePart(upload.Header)
if err != nil {
return nil, err
}
// Copy file contents into request
if _, err = io.Copy(fieldWriter, upload.Content); err != nil {
return nil, err
}
// Copy additional parameters
for key, array := range body {
for _, value := range array {
_ = writer.WriteField(key, value)
}
}
writer.Close()
request, err := http.NewRequest(method, target.String(), &buf)
if err != nil {
return nil, err
}
request.Header.Set("Content-Type", writer.FormDataContentType())
request.Host = c.Host
return request, nil
}
func (c *Client) Do(req *http.Request) (*http.Response, error) {
return c.client.Do(req)
}