【发布时间】：2012-01-28 11:06:41
【问题描述】：
我尝试使用 Java 通过其 REST API 查询 Sugar，以获取特定用户（即当前登录的用户）在会议模块中的条目。
我已经尝试了几天，同时在谷歌上搜索解决方案。
我调用了 login()，得到了一个会话 ID，然后调用了 get_user_id()。使用返回的用户 ID，我尝试使用 get_entry_list() 查询会议模块。
要获得分配给用户 ID 的会议，它使用以下查询字符串，其中 mUserId 保存 get_user_id() 返回的用户 ID：
queryString = "meetings.assigned_user_id='"+mUserId+"'";
但我不仅想获得分配给用户的会议，还想获得他参加的所有会议。为此，我在查询中尝试对 meeting_users 表进行子查询。
这是我尝试过的查询字符串，它在 MySQL 提示符下工作。但是当我通过 REST 尝试这个时，它返回“无效的会话 ID”：
queryString = "meetings.id IN ( SELECT meetings_users.meeting_id FROM meetings_users WHERE meetings_users.user_id = '"+mUserId+"' )";
有人对此有提示吗？哪些情况会导致“无效会话 ID”？
什么也不起作用，例如正在将“and deleted = '0'”附加到第一个声明的查询中：
queryString = "meetings.assigned_user_id='"+mUserId+"' and deleted = '0'";
也失败了。
这里要求的是完整的代码示例，平台是 Android，API 级别 8：
private JSONArray getEntryList(String moduleName,
String selectFields[], String queryString, String orderBy, int max_results) throws JSONException, IOException, KeyManagementException, NoSuchAlgorithmException
{
JSONArray jsoSub = new JSONArray();
if (selectFields.length > 0)
{
for (int i = 0; i < selectFields.length; i++)
{
jsoSub.put(selectFields[i]);
}
}
// get_entry_list expects parameters to be ordered, JSONObject does
// not provide this, so I built my JSON String on my own
String sessionIDPrefix = "{\"session\":\""+ mSessionId+ "\"," +
"\"modulename\":\""+ moduleName+ "\"," +
"\"query\":\""+ queryString + "\"," +
"\"order_by\":\""+ orderBy + "\"," +
"\"offset\":\""+ mNextOffset+ "\"," +
"\"select_fields\":["+ jsoSub.toString().substring(
1, jsoSub.toString().length()-2)+ "\"],"+
"\"max_results\":\""+ 20 + "\"}";
String restData = sessionIDPrefix;
Log.d(TAG, restData);
String data = null;
String baseurl = mUrl + REST_URI_APPEND;
data = httpPost(baseurl+"?method=get_entry_list&input_type=json&response_type=json&rest_data="+restData);
Log.d(TAG, data);
JSONObject jsondata = new JSONObject(data);
mResultCount = jsondata.getInt("result_count");
mNextOffset = jsondata.getInt("next_offset");
return jsondata.getJSONArray("entry_list");
}
private String httpPost(String urlStr) throws IOException{
String urlSplitted [] = urlStr.split("/", 4);
String hostPort[] = urlSplitted[2].split(":");
String hostname = hostPort[0];
int port = 80;
if (hostPort.length > 1)
port = new Integer(hostPort[1]);
String file = "/"+urlSplitted[3];
Log.d(TAG, hostname + ", " + port + ", " +file);
URL url = null;
try {
url = new URL("http", hostname, port, file);
} catch (MalformedURLException e) {
throw new IOException(mContext.getText(R.string.error_malformed_url).toString());
}
Log.d(TAG, "URL "+url.toString());
HttpURLConnection conn = null;
try {
conn = (HttpURLConnection) url.openConnection();
} catch (IOException e) {
throw new IOException(mContext.getText(R.string.error_conn_creat).toString());
}
conn.setConnectTimeout(60 * 1000);
conn.setReadTimeout(60 * 1000);
try {
conn.setRequestMethod("POST");
} catch (ProtocolException e) {
throw new IOException(mContext.getText(R.string.error_post).toString());
}
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.setAllowUserInteraction(false);
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
try {
conn.connect();
} catch (IOException e) {
throw new IOException(mContext.getText(R.string.error_conn_open).toString()
+ "\n" + e.getMessage());
}
int response = 0;
String responseMessage = null;
try {
response = conn.getResponseCode();
responseMessage = conn.getResponseMessage();
} catch (IOException e) {
conn.disconnect();
throw new IOException(mContext.getText(R.string.error_resp_io).toString());
}
Log.d(TAG, "Exception Response "+ response);
if (response != 200) {
conn.disconnect();
throw new IOException(mContext.getText(R.string.error_http).toString()
+ "\n" + response + " " + responseMessage);
}
StringBuilder sb = null;
try {
BufferedReader rd = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
Log.d(TAG,"line " + line);
sb.append(line);
}
rd.close();
} catch (IOException e) {
conn.disconnect();
throw new IOException(mContext.getText(R.string.error_resp_read).toString());
}
conn.disconnect();
if (sb.toString() == null)
{
throw new IOException(mContext.getText(R.string.error_resp_empty).toString());
}
return sb.toString();
}
调用上面的代码：
if (login() != OK)
return null;
mResultCount = -1;
mNextOffset = 0;
mUserId = getUserId();
String fields[] = new String [] {
"id",
"name",
"description",
"location",
"date_start",
"date_end",
"status",
"type",
"reminder_time",
"parent_type",
"parent_id",
"deleted",
"date_modified"
};
String queryString = null;
if (syncAllUsers)
queryString = "";
else
{
queryString = "meetings.assigned_user_id = 'seed_sarah_id' and meetings.deleted = '0'";
//queryString = "meetings.id IN ( SELECT meeting_id FROM meetings_users WHERE user_id ='"+mUserId+"'";
}
entryList.clear();
while (mResultCount != 0)
{
if (!seamless_login())
return null;
JSONArray serverEntryList = getEntryList(
"Meetings", fields, queryString, "date_start", 0);
//... do sth with data
}
totalContactsResults += mResultCount;
}
logout();
login() 返回有效的会话 id，getUserId() 返回正确的 id。整个代码已经用于获取联系人，也可以用于上述的简单查询。
提前致谢
马克
【问题讨论】：
标签： java android soap sugarcrm