1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
#import "foundation_request.h"
#include "TargetConditionals.h"
#if TARGET_OS_IPHONE
#import <UIKit/UIKit.h>
#include <atomic>
#endif
#include <memory>
#include <string>
#include <functional>
#include <mbgl/platform/request.hpp>
#include <mbgl/platform/platform.hpp>
#include <mbgl/util/std.hpp>
#include <mbgl/util/uv.hpp>
dispatch_once_t request_initialize = 0;
NSURLSession *session = nullptr;
#if TARGET_OS_IPHONE
std::atomic<int> active_tasks;
#endif
// We're using a child class to make sure ARC is working correctly, as well as to add activity
// indicators on iOS.
class FoundationRequest : public mbgl::platform::Request {
public:
FoundationRequest(const std::string &url,
std::function<void(mbgl::platform::Response *)> callback,
std::shared_ptr<uv::loop> loop)
: Request(url, callback, loop) {
#if TARGET_OS_IPHONE
active_tasks++;
dispatch_async(dispatch_get_main_queue(), ^(void) {
[[UIApplication sharedApplication]
setNetworkActivityIndicatorVisible:(active_tasks > 0)];
});
#endif
}
~FoundationRequest() {
#if TARGET_OS_IPHONE
active_tasks--;
dispatch_async(dispatch_get_main_queue(), ^(void) {
[[UIApplication sharedApplication]
setNetworkActivityIndicatorVisible:(active_tasks > 0)];
});
#endif
}
NSURLSessionDataTask *task = nullptr;
};
std::shared_ptr<mbgl::platform::Request>
mbgl::platform::request_http(const std::string &url,
std::function<void(Response *)> callback,
std::shared_ptr<uv::loop> loop) {
dispatch_once(&request_initialize, ^{
NSURLSessionConfiguration *sessionConfig =
[NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfig.timeoutIntervalForResource = 30;
sessionConfig.HTTPMaximumConnectionsPerHost = 8;
sessionConfig.requestCachePolicy = NSURLRequestUseProtocolCachePolicy;
session = [NSURLSession sessionWithConfiguration:sessionConfig];
#if TARGET_OS_IPHONE
active_tasks = 0;
#endif
});
std::shared_ptr<FoundationRequest> req =
std::make_shared<FoundationRequest>(url, callback, loop);
// Note that we are creating a new shared_ptr pointer(!) to make sure there is at least one
// shared_ptr in existence while the NSURLSession is loading our data. We are making sure in the
// callback that this pointer gets destroyed again.
std::shared_ptr<Request> *req_ptr = new std::shared_ptr<Request>(req);
NSURLSessionDataTask *task = [session
dataTaskWithURL:[NSURL URLWithString:@(url.c_str())]
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if ([error code] == NSURLErrorCancelled) {
// We intentionally cancelled this request. Make sure we clear the shared_ptr to resolve
// the circular reference. We're referencing this shared_ptr by value so that the object
// stays around until this completion handler is invoked.
delete req_ptr;
return;
}
if (!error && [response isKindOfClass:[NSHTTPURLResponse class]]) {
(*req_ptr)->res->code = [(NSHTTPURLResponse *)response statusCode];
(*req_ptr)->res->body = {(const char *)[data bytes], [data length]};
} else {
(*req_ptr)->res->error_message = [[error localizedDescription] UTF8String];
}
(*req_ptr)->complete();
delete req_ptr;
}];
req->task = task;
[task resume];
return req;
}
void mbgl::platform::cancel_request_http(const std::shared_ptr<Request> &req) {
if (req) {
[((FoundationRequest *)(req.get()))->task cancel];
}
}
|
