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
|
#pragma once
#include "std/cstdint.hpp"
#include "std/function.hpp"
#include "std/string.hpp"
#include "std/vector.hpp"
#include "std/utility.hpp"
namespace downloader
{
namespace non_http_error_code
{
auto constexpr kIOException = -1;
auto constexpr kWriteException = -2;
auto constexpr kInconsistentFileSize = -3;
auto constexpr kNonHttpResponse = -4;
auto constexpr kInvalidURL = -5;
auto constexpr kCancelled = -6;
} // namespace non_http_error_code
/// Request in progress will be canceled on delete
class HttpRequest
{
public:
enum class Status
{
InProgress,
Completed,
Failed,
FileNotFound
};
/// <current, total>, total can be -1 if size is unknown
using Progress = pair<int64_t, int64_t>;
using Callback = function<void(HttpRequest & request)>;
protected:
Status m_status;
Progress m_progress;
Callback m_onFinish;
Callback m_onProgress;
HttpRequest(Callback const & onFinish, Callback const & onProgress);
public:
virtual ~HttpRequest() = 0;
Status GetStatus() const { return m_status; }
Progress const & GetProgress() const { return m_progress; }
/// Either file path (for chunks) or downloaded data
virtual string const & GetData() const = 0;
/// Response saved to memory buffer and retrieved with Data()
static HttpRequest * Get(string const & url,
Callback const & onFinish,
Callback const & onProgress = Callback());
/// Content-type for request is always "application/json"
static HttpRequest * PostJson(string const & url, string const & postData,
Callback const & onFinish,
Callback const & onProgress = Callback());
/// Download file to filePath.
/// @param[in] fileSize Correct file size (needed for resuming and reserving).
static HttpRequest * GetFile(vector<string> const & urls,
string const & filePath, int64_t fileSize,
Callback const & onFinish,
Callback const & onProgress = Callback(),
int64_t chunkSize = 512 * 1024,
bool doCleanOnCancel = true);
};
string DebugPrint(HttpRequest::Status status);
} // namespace downloader
|
