// HTTP handler for a GET of a specific doc attachment
func (h *handler) handleGetAttachment() error {
docid := h.PathVar("docid")
attachmentName := h.PathVar("attach")
revid := h.getQuery("rev")
body, err := h.db.GetRev(docid, revid, false, nil)
if err != nil {
return err
}
if body == nil {
return kNotFoundError
}
meta, ok := db.BodyAttachments(body)[attachmentName].(map[string]interface{})
if !ok {
return base.HTTPErrorf(http.StatusNotFound, "missing attachment %s", attachmentName)
}
digest := meta["digest"].(string)
data, err := h.db.GetAttachment(db.AttachmentKey(digest))
if err != nil {
return err
}
h.setHeader("Etag", strconv.Quote(digest))
if contentType, ok := meta["content_type"].(string); ok {
h.setHeader("Content-Type", contentType)
}
if encoding, ok := meta["encoding"].(string); ok {
h.setHeader("Content-Encoding", encoding)
}
if h.privs == adminPrivs { // #720
h.setHeader("Content-Disposition", fmt.Sprintf("attachment; filename=%q", attachmentName))
}
h.response.Write(data)
return nil
}
// HTTP handler for a GET of a specific doc attachment
func (h *handler) handleGetAttachment() error {
docid := h.PathVar("docid")
attachmentName := h.PathVar("attach")
revid := h.getQuery("rev")
body, err := h.db.GetRev(docid, revid, false, nil)
if err != nil {
return err
}
if body == nil {
return kNotFoundError
}
meta, ok := db.BodyAttachments(body)[attachmentName].(map[string]interface{})
if !ok {
return base.HTTPErrorf(http.StatusNotFound, "missing attachment %s", attachmentName)
}
digest := meta["digest"].(string)
data, err := h.db.GetAttachment(db.AttachmentKey(digest))
if err != nil {
return err
}
status, start, end := h.handleRange(uint64(len(data)))
if status > 299 {
return base.HTTPErrorf(status, "")
} else if status == http.StatusPartialContent {
data = data[start:end]
}
h.setHeader("Content-Length", strconv.FormatUint(uint64(len(data)), 10))
h.setHeader("Etag", strconv.Quote(digest))
if contentType, ok := meta["content_type"].(string); ok {
h.setHeader("Content-Type", contentType)
}
if encoding, ok := meta["encoding"].(string); ok {
if h.getOptBoolQuery("content_encoding", true) {
h.setHeader("Content-Encoding", encoding)
} else {
// Couchbase Lite wants to download the encoded form directly and store it that way,
// but some HTTP client libraries like NSURLConnection will automatically decompress
// the HTTP response if it has a Content-Encoding header. As a workaround, allow the
// client to add ?content_encoding=false to the request URL to disable setting this
// header.
h.setHeader("X-Content-Encoding", encoding)
h.setHeader("Content-Type", "application/gzip")
}
}
if h.privs == adminPrivs { // #720
h.setHeader("Content-Disposition", fmt.Sprintf("attachment; filename=%q", attachmentName))
}
h.response.WriteHeader(status)
h.response.Write(data)
return nil
}
// HTTP handler for a PUT of an attachment
func (h *handler) handlePutAttachment() error {
docid := h.PathVar("docid")
attachmentName := h.PathVar("attach")
attachmentContentType := h.rq.Header.Get("Content-Type")
if attachmentContentType == "" {
attachmentContentType = "application/octet-stream"
}
revid := h.getQuery("rev")
if revid == "" {
revid = h.rq.Header.Get("If-Match")
}
attachmentData, err := h.readBody()
if err != nil {
return err
}
body, err := h.db.GetRev(docid, revid, false, nil)
if err != nil && base.IsDocNotFoundError(err) {
// couchdb creates empty body on attachment PUT
// for non-existant doc id
body = db.Body{}
body["_rev"] = revid
} else if err != nil {
return err
} else if body != nil {
body["_rev"] = revid
}
// find attachment (if it existed)
attachments := db.BodyAttachments(body)
if attachments == nil {
attachments = make(map[string]interface{})
}
// create new attachment
attachment := make(map[string]interface{})
attachment["data"] = attachmentData
attachment["content_type"] = attachmentContentType
//attach it
attachments[attachmentName] = attachment
body["_attachments"] = attachments
newRev, err := h.db.Put(docid, body)
if err != nil {
return err
}
h.setHeader("Etag", strconv.Quote(newRev))
h.writeJSONStatus(http.StatusCreated, db.Body{"ok": true, "id": docid, "rev": newRev})
return nil
}