上傳前在字典中轉義字符 - 目標C

Question

我的公司有一個直接與Salesforce連接的iOS應用程序，但有一個主要缺點。當用戶嘗試上傳非法字符時，應用程序掛起，返回錯誤值或導致其他不穩定行爲。

我在神祕的interwebs（感謝，MailDrop）中發現了一個非常方便的代碼片段，它可以過濾一個字符串並用正斜槓轉義這些非法字符。然後它返回字符串中的值，準備插入/查詢。

但是，我真正遇到的一件事是讓我們的應用程序能夠正常工作。我們的數據存儲在字典中，並以各種方式（查詢服務器或手動輸入）以及在應用程序生命週期中的不同時間寫入。我不太清楚如何用最有效的方法調用這個漂亮的'escapeSosl'。每次我寫入Core Data時，是否有辦法逃避這些角色？我最害怕的是通過應用程序並打電話數百次。

這裏是逃脫方法：

- (NSString *)escapeSosl:(NSString *)src { 
     // from docs, these are all reserved 
     NSArray *reserved = [NSArray arrayWithObjects:@"\\", @"&", @"|", @"!", @"{", @"}", @"[", @"]", @"^", @"~", @"*:", @":", @"'" ,@"\"", @"+", @"-", nil]; 
     NSMutableString *s = [NSMutableString stringWithString:src]; 
     NSString *r; 
     NSEnumerator *e = [reserved objectEnumerator]; 
     while (r = [e nextObject]) 
      [s replaceOccurrencesOfString:r withString:[NSString stringWithFormat:@"\\%@", r] options:NSLiteralSearch range:NSMakeRange(0, [s length])]; 
     return s; 
    } 

我發現複雜的是這些escapings的時機，以及如何應用到各種情況。例如，應用程序使用手動輸入的位置或通過反向地理編碼查找的位置查詢Salesforce的帳戶。下面是該應用從Salesforce的服務器請求數據的例子：

-(void)checkServerForLeadMatchingAddressOnAccount:(SFAccount *)account { 

currentAccount = account; 

//Parse the account location data, removing the last word in the `street` object 
NSString *street = account.shippingStreetAddress; 
NSMutableArray *streetArray = [[street componentsSeparatedByString:@" "] mutableCopy]; 
[streetArray removeLastObject]; 
street = [streetArray componentsJoinedByString:@" "]; 
street = [street stringByAppendingString:@"_%"]; 

NSString *city = account.shippingCity; 
NSString *state = account.shippingState; 
NSString *zip = account.shippingZIP; 

//Check for a matching lead on the server. User the callback methods to proceed (either create new data on the server or download to the device 

NSLog(@"is connected: %i", self.isConnectedToServer); 

if (self.isConnectedToServer){ 
    requestCheckForLead = [[SFRestAPI sharedInstance] requestForQuery:[NSString stringWithFormat:@"SELECT ID, Company, Name, Street, City, State, PostalCode, Phone FROM Lead WHERE PostalCode = '%@' AND Street LIKE '%@' AND City = '%@' AND State = '%@'", zip, street, city, state]]; 
    [[SFRestAPI sharedInstance] send:requestCheckForLead delegate:self]; 
    openTasks++; 
} else { 
    NSLog(@"I can't connect"); 
    [self.serverDelegate serverObjectManager:self communicationSuccessful:NO withResponse:@"Could not connect to the server."]; 
} 

另一個領域，我可能轉義字符是正確的開始上傳到服務器之前。有幾件事情會上傳，包括賬戶，賬戶的聯繫人（1：1 rel。），賬戶的機會（1：1 rel。）和機會當前服務級別（1：many rel）。

下面是一個與帳戶關聯的聯繫人示例 - 它既使用字符串引用，也使用字典引用，但具有一些用於解析lastName的firstName的附加邏輯。我想以一種不需要擔心這些操作時機的方式來逃避數據。

NSMutableDictionary *contactDict = [NSMutableDictionary new]; 

if (myAccount.contact.email) { 
    [contactDict setObject:myAccount.contact.email forKey:@"Email"]; 
} else { 
    [contactDict setObject:@"" forKey:@"Email"]; 
} 

if (myAccount.contact.name) { 
    //Split name in two 
    NSArray *nameArray = [myAccount.contact.name componentsSeparatedByString:@" "]; 

    NSString *firstName = [nameArray objectAtIndex:0]; 
    NSString *lastName = [nameArray lastObject]; 


    [contactDict setObject:firstName forKey:@"firstName"]; 
    [contactDict setObject:lastName forKey:@"lastName"]; 
} else { 
    [contactDict setObject:@"" forKey:@"firstName"]; 
    [contactDict setObject:@"" forKey:@"lastName"]; 
} 

if (myAccount.contact.phone){ 
    [contactDict setObject:myAccount.contact.phone forKey:@"Phone"]; 
} else { 
    [contactDict setObject:@"" forKey:@"Phone"]; 
} 

updateContactRequest = [[SFRestAPI sharedInstance] requestForUpdateWithObjectType:@"Contact" objectId:myAccount.createdContactID fields:contactDict]; 
[[SFRestAPI sharedInstance] send:updateContactRequest delegate:self]; 

因此，這似乎是有點大的問題，但沒有任何人有一些指點，我怎麼能在這些各種字典轉義字符，使用類似於「escapeSosl」的代碼，我上面包含的東西，無論何時寫入核心數據？

Answer 1

在這一行你建立你的查詢

requestCheckForLead = [[SFRestAPI sharedInstance] requestForQuery:[NSString stringWithFormat:@"SELECT ID, Company, Name, Street, City, State, PostalCode, Phone FROM Lead WHERE PostalCode = '%@' AND Street LIKE '%@' AND City = '%@' AND State = '%@'", zip, street, city, state]]; 

強似street作爲參數傳遞[self escapeSosl:street]等爲其他PARAMS。