| Line |
Branch |
Exec |
Source |
| 1 |
|
|
/** |
| 2 |
|
|
* This file is part of the CernVM File System. |
| 3 |
|
|
*/ |
| 4 |
|
|
|
| 5 |
|
|
#include "subscriber_sse.h" |
| 6 |
|
|
|
| 7 |
|
|
#include <vector> |
| 8 |
|
|
|
| 9 |
|
|
#include "url.h" |
| 10 |
|
|
#include "util/logging.h" |
| 11 |
|
|
#include "util/pointer.h" |
| 12 |
|
|
#include "util/string.h" |
| 13 |
|
|
|
| 14 |
|
|
namespace { |
| 15 |
|
|
|
| 16 |
|
|
const LogFacilities &kLogInfo = DefaultLogging::info; |
| 17 |
|
|
const LogFacilities &kLogError = DefaultLogging::error; |
| 18 |
|
|
|
| 19 |
|
|
} // namespace |
| 20 |
|
|
|
| 21 |
|
|
namespace notify { |
| 22 |
|
|
|
| 23 |
|
✗ |
SubscriberSSE::SubscriberSSE(const std::string &server_url) |
| 24 |
|
|
: Subscriber() |
| 25 |
|
✗ |
, server_url_(server_url + "/notifications/subscribe") |
| 26 |
|
✗ |
, topic_() |
| 27 |
|
✗ |
, buffer_() |
| 28 |
|
✗ |
, should_quit_(false) { } |
| 29 |
|
|
|
| 30 |
|
✗ |
SubscriberSSE::~SubscriberSSE() { } |
| 31 |
|
|
|
| 32 |
|
✗ |
bool SubscriberSSE::Subscribe(const std::string &topic) { |
| 33 |
|
✗ |
const UniquePtr<Url> url(Url::Parse(server_url_)); |
| 34 |
|
|
|
| 35 |
|
✗ |
if (!url.IsValid()) { |
| 36 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogError, |
| 37 |
|
|
"SubscriberSSE - could not parse notification server url: %s\n", |
| 38 |
|
|
server_url_.c_str()); |
| 39 |
|
✗ |
return false; |
| 40 |
|
|
} |
| 41 |
|
|
|
| 42 |
|
✗ |
this->topic_ = topic; |
| 43 |
|
|
|
| 44 |
|
|
const std::string request = |
| 45 |
|
✗ |
"{\"version\":1,\"repository\":\"" + topic + "\"}"; |
| 46 |
|
|
|
| 47 |
|
✗ |
const char *user_agent_string = "cvmfs/" CVMFS_VERSION; |
| 48 |
|
|
|
| 49 |
|
✗ |
CURL *h_curl = curl_easy_init(); |
| 50 |
|
✗ |
if (h_curl == NULL) { |
| 51 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogError, "Could not create Curl handle\n"); |
| 52 |
|
✗ |
return false; |
| 53 |
|
|
} |
| 54 |
|
|
|
| 55 |
|
✗ |
if (h_curl) { |
| 56 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_NOPROGRESS, 0L); |
| 57 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_USERAGENT, user_agent_string); |
| 58 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_MAXREDIRS, 50L); |
| 59 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_CUSTOMREQUEST, "GET"); |
| 60 |
|
|
} |
| 61 |
|
|
|
| 62 |
|
✗ |
if (!h_curl) { |
| 63 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogError, |
| 64 |
|
|
"SubscriberSSE - error initializing CURL context\n"); |
| 65 |
|
✗ |
return false; |
| 66 |
|
|
} |
| 67 |
|
|
|
| 68 |
|
|
// Make request to acquire lease from repo services |
| 69 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_URL, server_url_.c_str()); |
| 70 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_POSTFIELDSIZE_LARGE, |
| 71 |
|
|
static_cast<curl_off_t>(request.length())); |
| 72 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_POSTFIELDS, request.c_str()); |
| 73 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_WRITEFUNCTION, CurlRecvCB); |
| 74 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_WRITEDATA, this); |
| 75 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_XFERINFOFUNCTION, CurlProgressCB); |
| 76 |
|
✗ |
curl_easy_setopt(h_curl, CURLOPT_XFERINFODATA, this); |
| 77 |
|
|
|
| 78 |
|
✗ |
bool success = true; |
| 79 |
|
✗ |
const CURLcode ret = curl_easy_perform(h_curl); |
| 80 |
|
✗ |
if (ret && ret != CURLE_ABORTED_BY_CALLBACK) { |
| 81 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogError, |
| 82 |
|
|
"SubscriberSSE - event loop finished with error: %d. Reply: %s\n", |
| 83 |
|
|
ret, this->buffer_.c_str()); |
| 84 |
|
✗ |
success = false; |
| 85 |
|
|
} |
| 86 |
|
|
|
| 87 |
|
✗ |
curl_easy_cleanup(h_curl); |
| 88 |
|
✗ |
h_curl = NULL; |
| 89 |
|
|
|
| 90 |
|
✗ |
return success; |
| 91 |
|
|
} |
| 92 |
|
|
|
| 93 |
|
✗ |
void SubscriberSSE::Unsubscribe() { atomic_write32(&should_quit_, 1); } |
| 94 |
|
|
|
| 95 |
|
✗ |
bool SubscriberSSE::ShouldQuit() const { return atomic_read32(&should_quit_); } |
| 96 |
|
|
|
| 97 |
|
✗ |
void SubscriberSSE::AppendToBuffer(const std::string &s) { |
| 98 |
|
✗ |
size_t start = 0; |
| 99 |
|
✗ |
if (s.substr(0, 6) == "data: ") { |
| 100 |
|
✗ |
start = 6; |
| 101 |
|
|
} |
| 102 |
|
✗ |
buffer_ += s.substr(start); |
| 103 |
|
|
} |
| 104 |
|
|
|
| 105 |
|
✗ |
void SubscriberSSE::ClearBuffer() { buffer_.clear(); } |
| 106 |
|
|
|
| 107 |
|
✗ |
size_t SubscriberSSE::CurlRecvCB(void *buffer, size_t size, size_t nmemb, |
| 108 |
|
|
void *userp) { |
| 109 |
|
✗ |
notify::SubscriberSSE *sub = static_cast<notify::SubscriberSSE *>(userp); |
| 110 |
|
|
|
| 111 |
|
✗ |
if (size * nmemb < 1) { |
| 112 |
|
✗ |
return 0; |
| 113 |
|
|
} |
| 114 |
|
|
|
| 115 |
|
✗ |
const std::string buf(static_cast<char *>(buffer)); |
| 116 |
|
|
|
| 117 |
|
✗ |
std::vector<std::string> lines = SplitString(buf, '\n'); |
| 118 |
|
|
|
| 119 |
|
✗ |
if (lines.size() == 1) { |
| 120 |
|
✗ |
sub->AppendToBuffer(lines[0]); |
| 121 |
|
|
} else { |
| 122 |
|
✗ |
sub->AppendToBuffer(lines[0]); |
| 123 |
|
|
const notify::Subscriber::Status st = |
| 124 |
|
✗ |
sub->Consume(sub->topic_, sub->buffer_); |
| 125 |
|
✗ |
sub->ClearBuffer(); |
| 126 |
|
✗ |
for (size_t i = 1; i < lines.size(); ++i) { |
| 127 |
|
✗ |
if (lines[i].substr(0, 5) == "data: ") { |
| 128 |
|
✗ |
sub->AppendToBuffer(lines[i]); |
| 129 |
|
|
} |
| 130 |
|
|
} |
| 131 |
|
✗ |
switch (st) { |
| 132 |
|
✗ |
case notify::Subscriber::kFinish: |
| 133 |
|
✗ |
sub->Unsubscribe(); |
| 134 |
|
✗ |
break; |
| 135 |
|
✗ |
case notify::Subscriber::kError: |
| 136 |
|
✗ |
return 0; |
| 137 |
|
✗ |
default: |
| 138 |
|
✗ |
break; |
| 139 |
|
|
} |
| 140 |
|
|
} |
| 141 |
|
|
|
| 142 |
|
✗ |
return size * nmemb; |
| 143 |
|
|
} |
| 144 |
|
|
|
| 145 |
|
✗ |
int SubscriberSSE::CurlProgressCB(void *clientp, curl_off_t dltotal, |
| 146 |
|
|
curl_off_t dlnow, curl_off_t ultotal, |
| 147 |
|
|
curl_off_t ulnow) { |
| 148 |
|
✗ |
notify::SubscriberSSE *sub = static_cast<notify::SubscriberSSE *>(clientp); |
| 149 |
|
✗ |
if (sub->ShouldQuit()) { |
| 150 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogInfo, |
| 151 |
|
|
"SubscriberSSE - quit request received. Stopping\n"); |
| 152 |
|
✗ |
return 1; |
| 153 |
|
|
} |
| 154 |
|
|
|
| 155 |
|
✗ |
return 0; |
| 156 |
|
|
} |
| 157 |
|
|
|
| 158 |
|
|
} // namespace notify |
| 159 |
|
|
|