Mercurial > hg > orthanc-stone

annotate Platforms/Wasm/WasmWebService.cpp @ 309:14ef1227120f am-callable-and-promise

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web services: better handling of failures
author am@osimis.io
date Fri, 28 Sep 2018 15:02:43 +0200
parents ed1a4302154f
children aad37d0b6407
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1 #include "WasmWebService.h"
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2 #include "json/value.h"
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3 #include "json/writer.h"
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4 #include <emscripten/emscripten.h>
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5
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6 #ifdef __cplusplus
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7 extern "C" {
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8 #endif
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9
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10 extern void WasmWebService_GetAsync(void* callableSuccess,
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11 void* callableFailure,
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12 const char* uri,
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13 const char* headersInJsonString,
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14 void* payload,
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15 unsigned int timeoutInSeconds);
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16
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17 extern void WasmWebService_PostAsync(void* callableSuccess,
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18 void* callableFailure,
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19 const char* uri,
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20 const char* headersInJsonString,
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21 const void* body,
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22 size_t bodySize,
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23 void* payload,
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24 unsigned int timeoutInSeconds);
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26
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27 void EMSCRIPTEN_KEEPALIVE WasmWebService_NotifyError(void* failureCallable,
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28 const char* uri,
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29 void* payload)
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30 {
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31 if (failureCallable == NULL)
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32 {
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33 throw;
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34 }
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35 else
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36 {
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37 reinterpret_cast<OrthancStone::MessageHandler<OrthancStone::IWebService::HttpRequestErrorMessage>*>(failureCallable)->
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38 Apply(OrthancStone::IWebService::HttpRequestErrorMessage(uri, reinterpret_cast<Orthanc::IDynamicObject*>(payload)));
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39 }
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40 }
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41
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42 void EMSCRIPTEN_KEEPALIVE WasmWebService_NotifySuccess(void* successCallable,
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43 const char* uri,
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44 const void* body,
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45 size_t bodySize,
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46 void* payload)
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47 {
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48 if (successCallable == NULL)
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49 {
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50 throw;
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51 }
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52 else
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53 {
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54 reinterpret_cast<OrthancStone::MessageHandler<OrthancStone::IWebService::HttpRequestSuccessMessage>*>(successCallable)->
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55 Apply(OrthancStone::IWebService::HttpRequestSuccessMessage(uri, body, bodySize, reinterpret_cast<Orthanc::IDynamicObject*>(payload)));
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56 }
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57 }
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58
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59 void EMSCRIPTEN_KEEPALIVE WasmWebService_SetBaseUri(const char* baseUri)
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60 {
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61 OrthancStone::WasmWebService::GetInstance().SetBaseUri(baseUri);
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62 }
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63
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64 #ifdef __cplusplus
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65 }
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66 #endif
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69
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70 namespace OrthancStone
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71 {
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72 MessageBroker* WasmWebService::broker_ = NULL;
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73
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74 void WasmWebService::SetBaseUri(const std::string baseUri)
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75 {
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76 // Make sure the base url ends with "/"
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77 if (baseUri.empty() ||
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78 baseUri[baseUri.size() - 1] != '/')
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79 {
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80 baseUri_ = baseUri + "/";
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81 }
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82 else
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83 {
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84 baseUri_ = baseUri;
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85 }
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86 }
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87
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88 void ToJsonString(std::string& output, const IWebService::Headers& headers)
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89 {
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90 Json::Value jsonHeaders;
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91 for (IWebService::Headers::const_iterator it = headers.begin(); it != headers.end(); it++ )
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92 {
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93 jsonHeaders[it->first] = it->second;
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94 }
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95
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96 Json::StreamWriterBuilder builder;
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97 std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
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98 std::ostringstream outputStr;
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99
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100 writer->write(jsonHeaders, &outputStr);
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101 output = outputStr.str();
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102 }
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103
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104 void WasmWebService::PostAsync(const std::string& relativeUri,
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105 const Headers& headers,
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106 const std::string& body,
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107 Orthanc::IDynamicObject* payload,
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108 MessageHandler<IWebService::HttpRequestSuccessMessage>* successCallable,
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109 MessageHandler<IWebService::HttpRequestErrorMessage>* failureCallable,
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110 unsigned int timeoutInSeconds)
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111 {
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112 std::string uri = baseUri_ + relativeUri;
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113 std::string headersInJsonString;
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114 ToJsonString(headersInJsonString, headers);
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115 WasmWebService_PostAsync(successCallable, failureCallable, uri.c_str(), headersInJsonString.c_str(),
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116 body.c_str(), body.size(), payload, timeoutInSeconds);
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117 }
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118
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119 void WasmWebService::GetAsync(const std::string& relativeUri,
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120 const Headers& headers,
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121 Orthanc::IDynamicObject* payload,
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122 MessageHandler<IWebService::HttpRequestSuccessMessage>* successCallable,
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123 MessageHandler<IWebService::HttpRequestErrorMessage>* failureCallable,
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124 unsigned int timeoutInSeconds)
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125 {
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126 std::string uri = baseUri_ + relativeUri;
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127 std::string headersInJsonString;
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128 ToJsonString(headersInJsonString, headers);
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129 WasmWebService_GetAsync(successCallable, failureCallable, uri.c_str(), headersInJsonString.c_str(), payload, timeoutInSeconds);
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130 }
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131
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132 }