Added transport for cookie authentication and updated docs

README.md

@@ -108,34 +108,19 @@ func main() {
 
 #### Authenticate with session cookie
 
-Here is an example with session cookie authentication.
+A more thorough, [runnable example](examples/cookieauth/main.go) is provided in the examples directory.
 
 ```go
-package main
-
-import (
-	"fmt"
-	"github.com/andygrunwald/go-jira"
-)
-
-func main() {
-	jiraClient, err := jira.NewClient(nil, "https://your.jira-instance.com/")
-	if err != nil {
-		panic(err)
+	tp := jira.CookieAuthTransport{
+		Username: "username",
+		Password: "password",
+		BaseURL:  "https://my.jira.com",
 	}
 
-	res, err := jiraClient.Authentication.AcquireSessionCookie("username", "password")
-	if err != nil || res == false {
-		fmt.Printf("Result: %v\n", res)
-		panic(err)
-	}
+	client, err := jira.NewClient(tp.Client(), tp.BaseURL)
+	u, _, err := client.User.Get("admin")
 
-	issue, _, err := jiraClient.Issue.Get("SYS-5156", nil)
-	if err != nil {
-		panic(err)
-	}
-
-	fmt.Printf("%s: %+v\n", issue.Key, issue.Fields.Summary)
+	fmt.Printf("\nEmail: %v\nSuccess!\n", u.EmailAddress)
 }
 ```
 
@@ -158,14 +143,14 @@ import (
 )
 
 func main() {
-	jiraClient, err := jira.NewClient(nil, "https://your.jira-instance.com/")
-	if err != nil {
-		panic(err)
+	tp := jira.CookieAuthTransport{
+		Username: "username",
+		Password: "password",
+		BaseURL:  "https://my.jira.com",
 	}
 
-	res, err := jiraClient.Authentication.AcquireSessionCookie("username", "password")
-	if err != nil || res == false {
-		fmt.Printf("Result: %v\n", res)
+	jiraClient, err := jira.NewClient(tp.Client(), tp.BaseURL)
+	if err != nil {
 		panic(err)
 	}
 
@@ -211,7 +196,13 @@ import (
 )
 
 func main() {
-	jiraClient, _ := jira.NewClient(nil, "https://jira.atlassian.com/")
+	tp := jira.CookieAuthTransport{
+		Username: "username",
+		Password: "password",
+		BaseURL:  "https://my.jira.com",
+	}
+
+	jiraClient, _ := jira.NewClient(tp.Client(), tp.BaseURL)
 	req, _ := jiraClient.NewRequest("GET", "/rest/api/2/project", nil)
 
 	projects := new([]jira.Project)

jira.go

@@ -8,8 +8,10 @@ import (
 	"net/http"
 	"net/url"
 	"reflect"
+	"time"
 
 	"github.com/google/go-querystring/query"
+	"github.com/pkg/errors"
 )
 
 // A Client manages communication with the JIRA API.
@@ -296,8 +298,10 @@ type BasicAuthTransport struct {
 // RoundTrip implements the RoundTripper interface.  We just add the
 // basic auth and return the RoundTripper for this transport type.
 func (t *BasicAuthTransport) RoundTrip(req *http.Request) (*http.Response, error) {
-	req.SetBasicAuth(t.Username, t.Password)
-	return t.transport().RoundTrip(req)
+	req2 := cloneRequest(req) // per RoundTripper contract
+
+	req2.SetBasicAuth(t.Username, t.Password)
+	return t.transport().RoundTrip(req2)
 }
 
 // Client returns an *http.Client that makes requests that are authenticated
@@ -315,3 +319,122 @@ func (t *BasicAuthTransport) transport() http.RoundTripper {
 	}
 	return http.DefaultTransport
 }
+
+// CookieAuthTransport is an http.RoundTripper that authenticates all requests
+// using Jira's cookie-based authentication.
+//
+// Note that it is generally preferrable to use HTTP BASIC authentication with the REST API.
+// However, this resource may be used to mimic the behaviour of JIRA's log-in page (e.g. to display log-in errors to a user).
+//
+// JIRA API docs: https://docs.atlassian.com/jira/REST/latest/#auth/1/session
+type CookieAuthTransport struct {
+	Username string
+	Password string
+	BaseURL  string
+
+	// SessionObject is the authenticated cookie string.s
+	// It's passed in each call to prove the client is authenticated.
+	sessionObject []*http.Cookie
+
+	// Transport is the underlying HTTP transport to use when making requests.
+	// It will default to http.DefaultTransport if nil.
+	Transport http.RoundTripper
+}
+
+// RoundTrip adds the session object to the request.
+func (t *CookieAuthTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	if t.sessionObject == nil {
+		err := t.setSessionObject()
+		if err != nil {
+			return nil, errors.Wrap(err, "cookieauth: no session object has been set")
+		}
+	}
+
+	req2 := cloneRequest(req) // per RoundTripper contract
+	for _, cookie := range t.sessionObject {
+		req2.AddCookie(cookie)
+	}
+
+	return t.transport().RoundTrip(req2)
+}
+
+// Client returns an *http.Client that makes requests that are authenticated
+// using cookie authentication
+func (t *CookieAuthTransport) Client() *http.Client {
+	return &http.Client{Transport: t}
+}
+
+// setSessionObject attempts to authenticate the user and set
+// the session object (e.g. cookie)
+func (t *CookieAuthTransport) setSessionObject() error {
+	req, err := t.getAuthRequest()
+	if err != nil {
+		return err
+	}
+
+	var authClient = &http.Client{
+		Timeout: time.Second * 60,
+	}
+	resp, err := authClient.Do(req)
+	if err != nil {
+		return err
+	}
+
+	t.sessionObject = resp.Cookies()
+	return nil
+}
+
+// getAuthRequest assembles the request to get the authenticated cookie
+func (t *CookieAuthTransport) getAuthRequest() (*http.Request, error) {
+	apiEndpoint := "rest/auth/1/session"
+	body := struct {
+		Username string `json:"username"`
+		Password string `json:"password"`
+	}{
+		t.Username,
+		t.Password,
+	}
+
+	ep, err := url.Parse(apiEndpoint)
+	if err != nil {
+		return nil, err
+	}
+	base, err := url.Parse(t.BaseURL)
+	if err != nil {
+		return nil, err
+	}
+
+	u := base.ResolveReference(ep)
+
+	b := new(bytes.Buffer)
+	json.NewEncoder(b).Encode(body)
+
+	req, err := http.NewRequest("POST", u.String(), b)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	return req, nil
+}
+
+func (t *CookieAuthTransport) transport() http.RoundTripper {
+	if t.Transport != nil {
+		return t.Transport
+	}
+	return http.DefaultTransport
+}
+
+// cloneRequest returns a clone of the provided *http.Request.
+// The clone is a shallow copy of the struct and its Header map.
+func cloneRequest(r *http.Request) *http.Request {
+	// shallow copy of the struct
+	r2 := new(http.Request)
+	*r2 = *r
+	// deep copy of the Header
+	r2.Header = make(http.Header, len(r.Header))
+	for k, s := range r.Header {
+		r2.Header[k] = append([]string(nil), s...)
+	}
+	return r2
+}

jira_test.go

@@ -475,7 +475,8 @@ func TestBasicAuthTransport(t *testing.T) {
 		Username: username,
 		Password: password,
 	}
-	basicAuthClient, _ := NewClient(tp.Client(), "/")
+
+	basicAuthClient, _ := NewClient(tp.Client(), testServer.URL)
 	req, _ := basicAuthClient.NewRequest("GET", ".", nil)
 	basicAuthClient.Do(req, nil)
 }