Question

我正在编写一个邮件客户端的iOS应用程序。由于某些限制，我必须使用EWS（Exchange Web服务）来处理邮箱。我所能做的就是向服务器发送SOAP请求以获取必要的信息。到目前为止，我已设法使用SyncFolderItems Operation获取每个文件夹中的邮件列表。之后，我使用GetItem (E-mail Message) Operation获取每个项目的详细信息。上次请求仅返回电子邮件附件ID和名称，但不返回其大小。但我需要知道它们让用户决定是否下载它们。我如何获得这些信息？

以下是我向服务器创建SOAP请求的代码。

+(NSString*) syncFolderItems:(NSString*)folderID :(NSString*) syncState 
{
    NSString * syncStateStr=@"<SyncState>%@</SyncState>";
    if(syncState!=nil && ![syncState isEqualToString:@""])
    {
        syncStateStr=[NSString stringWithFormat:syncStateStr,syncState];
    }
    else
        syncStateStr=@"";

    NSString * request= @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
    "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:t=\"http://schemas.microsoft.com/exchange/services/2006/types\">"
    "<soap:Body>"
    "<SyncFolderItems xmlns=\"http://schemas.microsoft.com/exchange/services/2006/messages\">"
    "<ItemShape>"
    "<t:BaseShape>IdOnly</t:BaseShape>"
    "</ItemShape>"
    "<SyncFolderId>"
    "<t:FolderId Id=\"%@\"/>"
    "</SyncFolderId>"
    "%@"
    "<MaxChangesReturned>10</MaxChangesReturned>"
    "</SyncFolderItems>"
    "</soap:Body>"
    "</soap:Envelope>";
    return [NSString stringWithFormat:request, folderID,syncStateStr];
}

+(NSString*)getMailItemsDetails:(NSMutableArray*)items
{
    NSString *request = 
    @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
    "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:t=\"http://schemas.microsoft.com/exchange/services/2006/types\">"
    "<soap:Body>"
    "<GetItem xmlns=\"http://schemas.microsoft.com/exchange/services/2006/messages\">"
    "<ItemShape>"
    "<t:BaseShape>Default</t:BaseShape>"
    "<t:IncludeMimeContent>false</t:IncludeMimeContent>"
        "<t:AdditionalProperties>"
            "<t:FieldURI FieldURI=\"item:Attachments\"/>"
        "</t:AdditionalProperties>"
    "</ItemShape>"
    "<ItemIds>"
    "%@"
    "</ItemIds>"
    "</GetItem>"
    "</soap:Body>"
    "</soap:Envelope>";

    NSString *itemIdTemplate = @"<t:ItemId Id=\"%@\" />";
    NSString *itemsIds = @"";

    for(NSString *msgID in items)
    {
        NSString *itemId = [NSString stringWithFormat:itemIdTemplate, msgID];
        itemsIds = [itemsIds stringByAppendingString:itemId];
    }

    return [NSString stringWithFormat:request, itemsIds];
}

我错过了什么吗？（可能是一些额外的属性？）我必须使用不同的请求吗？ EWS请求是否可以这样做？如果没有，是否有解决问题的解决方法？任何帮助将不胜感激。

Answer 1

Yarlik，据我说，服务器应该发送大小。

无论如何，让我看看是否找到了什么，必须转发给你。

但是，你可以在代表中做一件事，即;

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

}
-(NSURLRequest *)connection:(NSURLConnection *)connection
        willSendRequest:(NSURLRequest *)request
       redirectResponse:(NSURLResponse *)response {
}

long long fileSize = [response expectedContentLength];

它会给你文件大小。

EWS：如何在iOS中附件下载之前获取文件附件大小

1 个答案: