从json文本中删除回车

Question

我从api调用中获得返回的json文本，并从这里通过脚本json序列化和反序列化运行它https://www.mql5.com/en/code/13663.

我的问题是，它只处理json的前几个部分，因为我认为json结构中有换行符/回车符。我没有收到任何错误消息，只是一个包含换行之前所有内容的数组。

我不想删除json中文本字段中的换行符，只想删除json结构中的返回符。每次都在{"ok":true,"result":[{"update_id":568022212,之后的位置

这是一个完整的

{"ok":true,"result":[{"update_id":568022212,
"channel_post":{"message_id":436,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},"date":1588899840,"reply_to_message":{"message_id":372,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},"date":1588838583,"text":"AnGbpusd buy now 1.2360nSl 1.2280 nTp openn","entities":[{"offset":52,"length":11,"type":"mention"}]},"text":"An42 pips bookd closeud83dudfe2ud83dudfe2"}},{"update_id":568022213,
"channel_post":{"message_id":437,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},"date":1588900321,"reply_to_message":{"message_id":435,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},"date":1588893671,"text":"AnGold buy 1713.3nSl 1702 nTp opennSwing trade"},"text":"Amazonn60 pips bookd closeud83dudfe2ud83dudfe2"}},{"update_id":568022214,
"channel_post":{"message_id":438,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},

MQL4代码：

int   GetUpdates()
{
if(m_token==NULL)
return(ERR_TOKEN_ISEMPTY);
string out;
string url=StringFormat("%s/bot%s/getUpdates",TELEGRAM_BASE_URL,m_token);
string params=StringFormat("offset=%d",m_update_id);
//---
int res=PostRequest(out,url,params,WEB_TIMEOUT);
if(res==0)
{
Print(StringDecode(out));
//--- parse result
CJAVal js(NULL,jtUNDEF);
bool done=js.Deserialize(out);
if(!done)
return(ERR_JSON_PARSING);
bool ok=js["ok"].ToBool();
if(!ok)
return(ERR_JSON_NOT_OK);
CCustomMessage msg;
int total=ArraySize(js["result"].m_e);
for(int i=0; i<total; i++)
{
CJAVal item=js["result"].m_e[i];
//---
msg.update_id=item["update_id"].ToInt();
//---
msg.message_id=item["message"]["message_id"].ToInt();
msg.message_date=(datetime)item["message"]["date"].ToInt();
//---
msg.message_text=item["message"]["text"].ToStr();
printf((datetime)item["message"]["date"].ToInt());
msg.message_text=StringDecode(msg.message_text);
//---
msg.from_id=item["message"]["from"]["id"].ToInt();
msg.from_first_name=item["message"]["from"]["first_name"].ToStr();
msg.from_first_name=StringDecode(msg.from_first_name);
msg.from_last_name=item["message"]["from"]["last_name"].ToStr();
msg.from_last_name=StringDecode(msg.from_last_name);
msg.from_username=item["message"]["from"]["username"].ToStr();
msg.from_username=StringDecode(msg.from_username);
//---
msg.chat_id=item["message"]["chat"]["id"].ToInt();
msg.chat_first_name=item["message"]["chat"]["first_name"].ToStr();
msg.chat_first_name=StringDecode(msg.chat_first_name);
msg.chat_last_name=item["message"]["chat"]["last_name"].ToStr();
msg.chat_last_name=StringDecode(msg.chat_last_name);
msg.chat_username=item["message"]["chat"]["username"].ToStr();
msg.chat_username=StringDecode(msg.chat_username);

Answer 1

我尝试使用同一个库，它在解析数组时似乎有一个错误。这就是我使用https://www.mql5.com/en/code/11134.它有一个缺点：不幸的是，您需要删除所有对象；因此有大量的代码。但至少它有效。

看起来你的json格式不正确，我以前会剪一点。

#include <json1.mqh> //modified version, https://www.mql5.com/en/forum/28928/page5#comment_15766620
//const string post_result=
//{"ok":true,"result":[
//{"update_id":568022212,"channel_post":{"message_id":436,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},
//"date":1588899840,"reply_to_message":{"message_id":372,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},
//"date":1588838583,"text":"AnGbpusd buy now 1.2360nSl 1.2280 nTp openn","entities":[{"offset":52,"length":11,"type":"mention"}]},"text":"An42 pips bookd closeud83dudfe2ud83dudfe2"}},
//{"update_id":568022213,"channel_post":{"message_id":437,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},
//"date":1588900321,"reply_to_message":{"message_id":435,"chat":{"id":-1001436032340,"title":"FORTUNA","type":"channel"},
//"date":1588893671,"text":"AnGold buy 1713.3nSl 1702 nTp opennSwing trade"},"text":"Amazonn60 pips bookd closeud83dudfe2ud83dudfe2" }}]}
//;

void function()
{
//---
const string post_result=getContent();//ok, you managed to get some string here
JSONParser *parser=new JSONParser();
JSONValue *value=parser.parse(post_result);
delete(parser);
if(CheckPointer(value)==POINTER_INVALID)
{
printf("%i %s: error!",__LINE__,__FILE__);
delete(value);
return;
}
JSONObject *obj=(JSONObject*)value;
const bool isSuccess=obj.getBool("ok");
printf("%i %s: isSuccess=%d",__LINE__,__FILE__,isSuccess);
if(!isSuccess)return;
JSONValue *resultValue=obj.getValue("result");
if(CheckPointer(resultValue)!=POINTER_INVALID)
{
JSONArray *resultValueArray=resultValue;
for(int i=0;i<resultValueArray.size();i++)
{
printf("%i %s: #%d=%s",__LINE__,__FILE__,i,resultValueArray.getObject(i).toString());
//you can work with JSONObject or with string, whatever is more convenient
parseResultLine(resultValueArray.getObject(i));
}
delete(resultValueArray);
}
delete(resultValue);
delete(obj);
}   
bool parseResultLine(JSONObject *object)
{
const long update_id=object.getLong("update_id");
JSONObject *channel_post=object.getObject("channel_post");
const long message_id=channel_post.getLong("message_id");
const datetime date=(datetime)channel_post.getInt("date");
const string text=channel_post.getString("text");
printf("%i %s: id=%s, dt=%d/%s, text=%s",__LINE__,__FILE__,IntegerToString(message_id),(int)date,TimeToString(date),text);
JSONObject *chat=channel_post.getObject("chat");
const long chat_id=chat.getLong("id");
const string chat_title=chat.getString("title");
printf("%i %s: chat-> id=%I64d title=%s type=%s",__LINE__,__FILE__,chat_id,chat_title,chat.getString("type"));
JSONObject *reply=channel_post.getObject("reply_to_message");
printf("%i %s: replied: id=%s, date=%s",__LINE__,__FILE__,string(reply.getLong("message_id")),TimeToString(reply.getInt("date")));
return true;
}