Reading emails with GTLGmailMessage on iOS
I followed the steps below https://developers.google.com/gmail/api/quickstart/ios
, and I can get the email list successfully, but I need to read each one.
This is how I do it:
- (void)fetchEmails {
self.output.text = @"Getting emails...";
NSString *newAPIStr = @"";
newAPIStr = [NSString stringWithFormat:@"https://www.googleapis.com/gmail/v1/users/me/profile"];
NSURL *url = [NSURL URLWithString:newAPIStr];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPMethod:@"GET"];
GTMOAuth2Authentication *currentAuth= self.service.authorizer;
GTMHTTPFetcher* myFetcher = [GTMHTTPFetcher fetcherWithRequest:request];
[myFetcher setAuthorizer:currentAuth];
[myFetcher beginFetchWithCompletionHandler:^(NSData *retrievedData, NSError *error) {
if (error != nil)
{
// status code or network error
NSLog(@"Ha ocurrido un error");
}
else {
// succeeded
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:retrievedData options:kNilOptions error:&error];
NSLog(@"json==>%@",json);
userid=[json objectForKey:@"emailAddress"];
GTLQueryGmail *query = [GTLQueryGmail queryForUsersMessagesList];
[self.service executeQuery:query delegate:self didFinishSelector:@selector(displayResultMessageListWithTicket:finishedWithObject:error:)];
}
}];
}
I need to call "profile" because I don't know any other way to get the user id and then get the list of emails.
- (void)displayResultMessageListWithTicket:(GTLServiceTicket *)ticket
finishedWithObject:(GTLGmailListMessagesResponse *)emailsResponse error:(NSError *)error
{
if (error == nil)
{
NSMutableString *labelString = [[NSMutableString alloc] init];
NSLog(@"emailsResponse =%@",emailsResponse);
if (emailsResponse.messages.count > 0)
{
[labelString appendString:@"Labels:\n"];
NSMutableArray *gmailMessageIds = [[NSMutableArray alloc] init];
for (GTLGmailMessage *message in emailsResponse.messages)
{
NSString *mess = message.identifier;
[gmailMessageIds addObject:mess];
}
GTLBatchQuery *batchQuery = [GTLBatchQuery batchQuery];
[gmailMessageIds enumerateObjectsUsingBlock:^(NSString *messageId, NSUInteger idx, BOOL *stop) {
GTLQueryGmail *query = [GTLQueryGmail queryForUsersMessagesGet];
//query.userId = ;
query.identifier = [NSString stringWithFormat:@"%llx", [messageId unsignedLongLongValue]];
query.format = kGTLGmailFormatRaw;
[batchQuery addQuery:query];
}];
[self.service executeQuery:batchQuery completionHandler:^(GTLServiceTicket *ticket, GTLBatchResult *result, NSError *error) {
NSArray *gmailMessages = result.successes.allValues; // This is an array of GTLGmailMessage objects
for (GTLGmailMessage *message in gmailMessages)
{
[labelString appendFormat:@"%@\n", message.JSONString];
}
}];
} else {
[labelString appendString:@"No emails found."];
}
self.output.text = labelString;
} else {
[self showAlert:@"Error" message:error.localizedDescription];
}
}
I have a problem: gmailMessages contains 100 items with no content
GTLBatchResult 0x7ffc39d66a50 (successes:100 failures:0)
And repeating this ... each message has 0 key / value pairs
message GTLGmailMessage * 0 key/value pairs 0x00007ffc39d50700
Is there another way to receive each email? I also tried:
GTLQueryGmail *query = [GTLQueryGmail queryForUsersMessages];
query.identifier = [NSString stringWithFormat:@"%llx", [messageId unsignedLongLongValue]];
query.format = kGTLGmailFormatRaw;
[self.service executeQuery:query delegate:self didFinishSelector:@selector(displayResultWithTicket:finishedWithObject:error:)];
But I think I have the same problem.
I must also say that I copied the GTLBatchQuery from this post and I need to change NSNumber *messageId
to NSString *messageId
:
[gmailMessageIds enumerateObjectsUsingBlock:^(NSNumber *messageId, NSUInteger idx, BOOL *stop)
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2 answers
This code is fast and works. Skipping the logic for Objective C is relatively easy.
// MARK: - Construct a query and get a list of upcoming labels from the gmail API
class func fetchEmails() {
let appd = UIApplication.sharedApplication().delegate as! AppDelegate
println("Getting Emails ")
let query = GTLQueryGmail.queryForUsersMessagesList()
appd.service.executeQuery(query,
delegate: self,
didFinishSelector: "displayResultWithTicket:finishedWithObject:error:"
)
}
//get Emails {id:"15015408a4a88b4e" threadId:"15015408a4a88b4e"}
class func displayResultWithTicket(ticket : GTLServiceTicket, finishedWithObject listMessageResponse : GTLGmailListMessagesResponse, error : NSError?) {
let appd = UIApplication.sharedApplication().delegate as! AppDelegate
if let error = error {
//show your error
return
}
for dictMessage in listMessageResponse.messages {
var tmpDict2 = dictMessage as! GTLGmailMessage
let ident = tmpDict2.identifier
let query = GTLQueryGmail.queryForUsersMessagesGet()
query.identifier = ident
// query.format = "metadata" //default full
appd.service.executeQuery(query,
delegate: self,
didFinishSelector: "displayResultWithTicketEachMessages:finishedWithObject:error:"
)
}
}
// Get each email
class func displayResultWithTicketEachMessages(ticket : GTLServiceTicket, finishedWithObject eachMessageResponse : GTLGmailMessage, error : NSError?) {
if let error = error {
Utils.showAlert("Error 2", message: error.localizedDescription)
return
} else {
logicForSaveMailInfo(eachMessageResponse)
}
}
class func logicForSaveMailInfo(eachMessageResponse: GTLGmailMessage) {
var labelId = eachMessageResponse.labelIds[0] as! String
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
if labelId == "INBOX" {
var mailInformationDict = NSMutableDictionary()
mailInformationDict.setValue(eachMessageResponse.snippet as String, forKey: "snippet")
mailInformationDict.setValue(eachMessageResponse.identifier as String, forKey: "gmailId")
mailInformationDict.setValue(eachMessageResponse.internalDate, forKey: "internaldate")
let payloadArray = eachMessageResponse.payload.headers as NSArray
for obj in payloadArray {
var payloadObj = obj as! GTLGmailMessagePartHeader
if payloadObj.name == "Subject" {
mailInformationDict.setValue(payloadObj.value, forKey: "subject")
}
if payloadObj.name == "From" {
var fromStr = payloadObj.value
var index2 = fromStr.rangeOfString("<", options: .BackwardsSearch)?.startIndex
var substring2 = ""
if index2 != nil {
substring2 = fromStr.substringToIndex(index2!)
} else {
substring2 = fromStr as String
}
mailInformationDict.setValue(substring2, forKey: "from")
}
if payloadObj.name == "To" {
var fromStr = payloadObj.value
var index2 = fromStr.rangeOfString("<", options: .BackwardsSearch)?.startIndex
var substringTo = ""
if index2 != nil {
substringTo = fromStr.substringToIndex(index2!)
} else {
substringTo = fromStr as String
}
mailInformationDict.setValue(substringTo, forKey: "to")
}
}
var parts = eachMessageResponse.payload.parts
var decodedBody: NSString?
if parts != nil {
let body: AnyObject? = parts[0].valueForKey("body")
if body!.valueForKey("data") != nil {
var base64DataString = body!.valueForKey("data") as! String
base64DataString = base64DataString.stringByReplacingOccurrencesOfString("_", withString: "/", options: NSStringCompareOptions.LiteralSearch, range: nil)
base64DataString = base64DataString.stringByReplacingOccurrencesOfString("-", withString: "+", options: NSStringCompareOptions.LiteralSearch, range: nil)
let decodedData = NSData(base64EncodedString: base64DataString, options:NSDataBase64DecodingOptions(rawValue: 0))
decodedBody = NSString(data: decodedData!, encoding: NSUTF8StringEncoding)
}
}
}
//Create counter for know when finish
if appDelegate.emailData.count == messageEmailsCounter {
println("finish charge emails")
}
}
If you need help, let me know.
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