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/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package webfinger
import (
"context"
"fmt"
"net/http"
"strings"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// WebfingerGETRequest handles requests to, for example, https://example.org/.well-known/webfinger?resource=acct:some_user@example.org
func (m *Module) WebfingerGETRequest(c *gin.Context) {
l := logrus.WithFields(logrus.Fields{
"func": "WebfingerGETRequest",
"user-agent": c.Request.UserAgent(),
})
q, set := c.GetQuery("resource")
if !set || q == "" {
l.Debug("aborting request because no resource was set in query")
c.JSON(http.StatusBadRequest, gin.H{"error": "no 'resource' in request query"})
return
}
// remove the acct: prefix if it's present
trimAcct := strings.TrimPrefix(q, "acct:")
// remove the first @ in @whatever@example.org if it's present
namestring := strings.TrimPrefix(trimAcct, "@")
// at this point we should have a string like some_user@example.org
l.Debugf("got finger request for '%s'", namestring)
usernameAndAccountDomain := strings.Split(namestring, "@")
if len(usernameAndAccountDomain) != 2 {
l.Debugf("aborting request because username and domain could not be parsed from %s", namestring)
c.JSON(http.StatusBadRequest, gin.H{"error": "bad request"})
return
}
username := strings.ToLower(usernameAndAccountDomain[0])
accountDomain := strings.ToLower(usernameAndAccountDomain[1])
if username == "" || accountDomain == "" {
l.Debug("aborting request because username or domain was empty")
c.JSON(http.StatusBadRequest, gin.H{"error": "bad request"})
return
}
if accountDomain != m.config.AccountDomain && accountDomain != m.config.Host {
l.Debugf("aborting request because accountDomain %s does not belong to this instance", accountDomain)
c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("accountDomain %s does not belong to this instance", accountDomain)})
return
}
// transfer the signature verifier from the gin context to the request context
ctx := c.Request.Context()
verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
if signed {
ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
}
resp, err := m.processor.GetWebfingerAccount(ctx, username)
if err != nil {
l.Debugf("aborting request with an error: %s", err.Error())
c.JSON(err.Code(), gin.H{"error": err.Safe()})
return
}
c.JSON(http.StatusOK, resp)
}
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