public static ZipCodeLookupResponse LookupZipCode(string firmName,string address1,string address2,string city,string state) {
//
ZipCodeLookupResponse response = new ZipCodeLookupResponse();
USPSWebToolsClient client = new USPSWebToolsClient();
try {
DataSet ds = client.LookupZipCode(firmName,address1,address2,city,state);
if (ds != null) response.Merge(ds);
client.Close();
}
catch (TimeoutException te) { client.Abort(); throw new ApplicationException(te.Message); }
catch (FaultException<USPSFault> cfe) { client.Abort(); throw new ApplicationException(cfe.Detail.Message); }
catch (FaultException fe) { client.Abort(); throw new ApplicationException(fe.Message); }
catch (CommunicationException ce) { client.Abort(); throw new ApplicationException(ce.Message); }
return response;
}
internal static async Task <List <Address> > ZipCodeLookupAsync(List <Address> input)
{
// limit is 5 addresses per request
string requestGuid = Guid.NewGuid().ToString();
Log.Information("{area}: New request for {packageTotal} packages. {requestGuid}", "ZipCodeLookup()", input.Count, requestGuid);
List <Address> output = new();
ZipCodeLookupRequest request;
int index = 0;
while (index < input.Count)
{
request = new ZipCodeLookupRequest
{
Address = input.Skip(index).Take(5).ToList(),
USERID = UspsApiUsername,
};
Log.Information("{area}: Fetching rates for {packageCount} package(s). {requestGuid}", "ZipCodeLookup()", input.Count, requestGuid);
XmlSerializer xsSubmit = new(typeof(ZipCodeLookupRequest));
var xml = "";
using (var sww = new StringWriter())
{
using XmlWriter writer = XmlWriter.Create(sww);
xsSubmit.Serialize(writer, request);
xml = sww.ToString();
}
string uspsUrl = "https://secure.shippingapis.com/ShippingAPI.dll";
var formData = new FormUrlEncodedContent(new[]
{
new KeyValuePair <string, string>("API", "ZipCodeLookup"),
new KeyValuePair <string, string>("XML", xml)
});
HttpClient httpClient = new()
{
Timeout = TimeSpan.FromSeconds(50)
};
HttpResponseMessage response = null;
int retryCount = 0;
DateTime responseTimer = DateTime.Now;
while (response == null || response.StatusCode != System.Net.HttpStatusCode.OK)
{
if (retryCount > 0)
{
Log.Warning("{area}: USPS Failed to Respond after " + retryCount + " seconds. Attempt {retryCount}. {requestGuid}", "ZipCodeLookup()", retryCount, requestGuid);
}
response = await httpClient.PostAsync(uspsUrl, formData).ConfigureAwait(false);
Thread.Sleep(1000 * retryCount);
httpClient.CancelPendingRequests();
retryCount++;
if (retryCount > 50)
{
Log.Error("{area}: USPS Failed to Respond after 50 attempts. {requestGuid}", "ZipCodeLookup()", retryCount, requestGuid);
throw new UspsApiException("408: After many attempts, the request to the USPS API did not recieve a response. Please try again later.");
}
}
TimeSpan responseTime = DateTime.Now.TimeOfDay.Subtract(responseTimer.TimeOfDay);
var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
Log.Information("{area}: USPS response received in {responseTime} ms. {requestGuid}", "ZipCodeLookup()", responseTime.Milliseconds, requestGuid);
try
{
XmlSerializer deserializer = new(typeof(ZipCodeLookupResponse));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(content));
ZipCodeLookupResponse responseJson = (ZipCodeLookupResponse)deserializer.Deserialize(ms);
index += 5;
foreach (Address validatedAddress in responseJson.Address)
{
Address orig = input.First(i => i.ID == validatedAddress.ID);
if (validatedAddress.Error != null)
{
Log.Warning("{area}: USPS Returned Error: {uspsErrorNumber} {uspsErrorDescription} {requestGuid}", "ZipCodeLookup()", validatedAddress.Error.Number, validatedAddress.Error.Description, requestGuid);
orig.Error = validatedAddress.Error;
}
orig.Zip5 = validatedAddress.Zip5;
orig.Zip4 = validatedAddress.Zip4;
output.Add(orig);
}
}
catch (Exception ex)
{
Log.Error("{area}: Exception: {ex} {requestGuid}", "ZipCodeLookup()", ex.ToString(), requestGuid);
throw new UspsApiException(ex);
}
}
if (output.Count != input.Count)
{
// something went wrong because counts should always match
Console.WriteLine("Counts did not match between input and output");
Log.Error("{area}: Counts did not match between input and output. {requestGuid}", "ZipCodeLookup()", requestGuid);
throw new UspsApiException("Counts did not match between input and output");
}
return(output);
}
