问题
I started using Yahoo's free weather API to get the weather data I need, but it seems each time I request a city weather data there is a chance that either I get updated data or old data from back to 1 to 8 days.
Here is a simple URL which I make my request with: Click here to see a sample request
The YQL query is simple, which requests the weather data for New York city:
select * from weather.forecast where woeid in (select woeid from geo.places(1) where text="New York")
But each time I refresh that URL, I might get a completely different result. for example I did refresh it right now a couple times (Now is 13th of November 2015, around 22:45 GMT time) and here are some results I got in the query.results.channel.item.condition.date part:
"date":"Fri, 13 Nov 2015 4:49 pm EST"
"date":"Thu, 12 Nov 2015 2:13 am EST"
"date":"Wed, 11 Nov 2015 1:49 am EST"
"date":"Fri, 13 Nov 2015 1:49 am EST"
This is very wired, how am I supposed to get current weather data like this when the API returns weather data for random dates each time I make a request?
Am I doing something wrong or missing something here?
Notes:
- This behavior is same for many different cities which I tried.
Using same query in YQL Console doesn't seem to be having same problem. (YQL Console)(Actually same problem has been spotted there too)- Same thing is also happening on this XML/RSS request method as well: http://weather.yahooapis.com/forecastrss?w=2459115
Updates:
- I did come across a case which returned me data from 8 days back!
- Using SORT functions of YQL doesn't fix the problem, since the sort is applied after selecting requested record/records.
Today (25th of November 2015), I have tried more than 20 refreshes and seems the data returning is always correct, it seems the problem is fixed.
On 26th of November 2015 Yahoo announced that the problem is fixed: Thanks for your feedback. This issue has been fixed. Please check out the site again. If you are still having this problem, please post a new idea on this forum.
回答1:
Yahoo dev's replied on twitter saying that they are investigating this issue. You can follow it up and upvote (for speeding the process) it here:
https://yahoo.uservoice.com/forums/207813/suggestions/10740099
回答2:
I have used the Yahoo Weather API XML format for years and noticed in that last couple of weeks this new bug. I tried to report the bug to https://developer.yahoo.com/weather/support but get a 404 page not found. I decided to parse the returned date if equal to current date to continue if not equal to re-call sub. this way I always get current weather but unfortunately that's a lot of unnecessary traffic / request maybe YDN will realize and fix. but without being able to report I don't know. I know this is not a fix but more a Band-Aid good luck!
Private Sub btnWeather_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnWeather.Click
If InternetConnection() = False Then
MsgBox("No internet connection!", vbExclamation, "Oops!")
Exit Sub
Else
'MsgBox("Internet connection detected!", vbInformation, "Huray!")
btnWeather.Enabled = False
lblWorking.Text = "Working ..."
tbTries.Text = "1"
Try
Dim t As New clsWeather(Format(Me.TxtBoxZIP.Text), "f")
lblTodaysDate.Text = FormatDateTime(Now.Date, DateFormat.ShortDate)
tbHigh.Text = t.high & "°"
lblCity.Text = TxtBoxZIP.Text & " Weather "
tbLow.Text = t.Low & "°"
tbDay.Text = t.day
tbDate.Text = t.date1
tbCurrenttemp.Text = t.currenttemp & "°"
tbCurrentCode.Text = t.currentcode
tbForcastCode.Text = t.ForcastCode
tbSunrise.Text = t.Sunrise
tbSunset.Text = t.Sunset
tbWind.Text = CInt(Val(t.Wind)) & " mph"
tbHumidity.Text = CInt(Val(t.humidity))
imgWeather.Image = Image.FromFile(t.GetImage)
CodeName()
If t.currenttemp < 85 And t.currenttemp > 45 Then
lblFeelsLike.Text = ""
tbFeelsLike.Text = ""
End If
If t.currenttemp > 85 Then
lblFeelsLike.Text = "Heat Index:"
Dim Temp = t.currenttemp
Dim RH = CInt(Val(t.humidity))
tbFeelsLike.Text = (-42.379 + 2.04901523 * Temp) + (10.14333127 * RH) - (0.22475541 * Temp * RH) - (0.00683783 * Temp * Temp) - (0.05481717 * RH * RH) + (0.00122874 * Temp * Temp * RH) + (0.00085282 * Temp * RH * RH) - (0.00000199 * Temp * Temp * RH * RH)
Dim num As Decimal = CType(tbFeelsLike.Text, Decimal)
Me.tbFeelsLike.Text = String.Format("{0:n0}", num)
tbFeelsLike.Text = tbFeelsLike.Text & "°"
End If
If t.currenttemp < 45 Then
lblFeelsLike.Text = "Wind Chill:"
tbFeelsLike.Text = CInt(Val(t.Chill)) & "°"
End If
Catch ex As Exception
MsgBox(ex.Message)
End Try
End If
Dim day As String = DateTime.Now.ToString("dd")
If day = tbDate.Text = True Then
tbDate1.Text = tbDate.Text
btnWeather.Enabled = True
lblWorking.Text = ""
Else
btnWeather_Click(sender, e)
tbTries.Text = tbTries.Text + 1
End If
End Sub
回答3:
I have a workaround: repeatedly call the api until you get a valid result. Here is the code I used to make my own custom weather widget: (when you test the code, it sometimes returns data not available even after 30 tries!)
I also tweeted on #YDN a few days back, but did not get any response.
var ydnwthr={};
var ydnStaleness=100000; //YDN weather api is f'ed up and returns stale data, so hammer it repeatedly and then test for data staleness
var abortydn=30; //abort after these many calls
var delayBetweencalls=200; //in milliseconds
var ydncounter=0;
var ydnInterval;
var apiquery=escape('select * from weather.forecast where woeid in (select woeid from geo.places(1) where text="lansing, mi")');
var ydnapiurl='https://query.yahooapis.com/v1/public/yql?q='+apiquery+'&format=json&env='+escape("store://datatables.org/alltableswithkeys");
$(function() {
function markupWeather(){
if(ydnStaleness>1.5) $("#weather").html('weather data not available..');
else{
/****************THIS IS WHERE YOU DO WHATEVER YOU WANT WITH THE "GOOD" ydnwthr OBJECT ***********/
var wthrMarkup = "<div id='swHead'>" + ydnwthr.title.replace(/Conditions for | e[sd]t/ig,"") + "<sub style='font-size:6pt;color:silver'>" +ydncounter+"</sub>"+"</div>";
wthrMarkup += "<div id='swBody' title='updated:" + ydnwthr.pubDate + ". click for details'><div id='swBodyBg'></div><div id='swCurrent'>";
wthrMarkup += ydnwthr.condition.text + ", " + ydnwthr.condition.temp +"°</div></div>";
$("#weather").html(wthrMarkup);
$("#swBodyBg").css('background-image', 'url(' + /".*"/.exec(ydnwthr.description) + ')');
for (i=0;i<5;i++){ //get 5 day weather and fit to container - (done without jquery for convenience)
var el = document.createElement("div");
el.innerText = ydnwthr.forecast[i].day.substr(0,2) + ": " + ydnwthr.forecast[i].text + ", " + ydnwthr.forecast[i].high + "/"+ ydnwthr.forecast[i].low;
$("#swBody")[0].appendChild(el);
while(parseInt(window.getComputedStyle(el, null).getPropertyValue('height')) > 42) {
var fontSize = parseFloat(window.getComputedStyle(el, null).getPropertyValue('font-size'));
el.style.fontSize = (fontSize - 1) + 'px';
}
}
}
}//end markupWeather
ydnInterval=setInterval(function(){
if(ydnStaleness<=2 || ydncounter>=abortydn) {
clearInterval(ydnInterval);
markupWeather();
}
$.ajax({url:ydnapiurl}).done(function(data){
ydnwthr = data.query.results.channel.item;
if(ydnwthr.pubDate) ydnStaleness=(new Date()-new Date(ydnwthr.pubDate))/3600000;
});
ydncounter++;
},delayBetweencalls);
});#weather {border:3px ridge silver;border-radius:5px;cursor:pointer;width:180px;font:10pt/28px arial,sans-serif}
#swHead {background:#bddeff;font-weight:bold;text-align:center;border-bottom:1px solid silver}
#swBodyBg{position:absolute;background-position:center;background-size:100px 100px;background-repeat:no-repeat;opacity: 0.5;height:100%;width:100%;z-index:-1}
#swBody{margin:0px 3px;position:relative;}
#swCurrent{padding:5px;font:bold 1.1em arial; width:100%;text-align:center}<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="weather"
onclick="self.open('http://www.wunderground.com/cgi-bin/findweather/getForecast?brand=wxmap&query=42.74461,-84.47283&lat=42.74461&lon=-84.47283&zoom=11&type=terrain&units=english&rad=0&sat=0&svr=0&cams=0&tor=0&wxsn=1&wxsn.mode=tw&wxsn.opa=50&wxsn.bcdgtemp=0&wxsn.rf=0')">
<i class="fa fa-spinner fa-spin fa-2x" style="margin:40px 65px"></i>
<div style="margin:30px">getting weather...</div>
</div>来源：https://stackoverflow.com/questions/33703009/yahoo-weather-api-randomly-returns-old-data