following optional packages may be useful: • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. • pycares is an alternative non-blocking DNS resolver that can recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl installation is encounter various problems with request timeouts (for more information, see http://curl.haxx.se/ libcurl/c/curl_easy_setopt.html#CURLOPTCONNECTTIMEOUTMS and comments in curl_httpclient.py). To select curl_httpclient

packages may be useful:pycurl [http://pycurl.io/] is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required. pycares [https://pypi.org/project/pycares/] is an alternative recent version of libcurl and pycurl. Currently the minimum supported version of libcurl is 7.22.0, and the minimum version of pycurl is 7.18.2. It is highly recommended that your libcurl installation is encounter various problems with request timeouts (for more information, see http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTCONNECTTIMEOUT MS and comments in curl_httpclient.py). To select

install them from CLion. For example, if you want to use libcurl to download an image from the Internet, navigate to the library list and search for libcurl. Information on how to add it to CMake will be displayed find_package(CURL) add_executable(project_name main.cpp) target_link_libraries(project_name CURL::libcurl) After reloading the CMake project, you should see Conan installing the libraries in the CMake output run on. For example if running the command with an older version of libcurl it will display: $ conan graph outdated --requires=libcurl/[*] ======== Computing dependency graph ======== Graph root cli Requirements

install them from CLion. For example, if you want to use libcurl to download an image from the Internet, navigate to the library list and search for libcurl. Information on how to add it to CMake will be displayed find_package(CURL) add_executable(project_name main.cpp) target_link_libraries(project_name CURL::libcurl) After reloading the CMake project, you should see Conan installing the libraries in the CMake output with an older version of libcurl it will display: $ conan graph outdated --requires=libcurl/[*] ======== Computing dependency graph ======== Graph root cli Requirements libcurl/8.5.0#95279f20d2443016907657f081a79261

install them from CLion. For example, if you want to use libcurl to download an image from the Internet, navigate to the library list and search for libcurl. Information on how to add it to CMake will be displayed find_package(CURL) add_executable(project_name main.cpp) target_link_libraries(project_name CURL::libcurl) After reloading the CMake project, you should see Conan installing the libraries in the CMake output run on. For example if running the command with an older version of libcurl it will display: $ conan graph outdated --requires=libcurl/[*] ======== Computing dependency graph ======== Graph root (continues

install them from CLion. For example, if you want to use libcurl to download an image from the Internet, navigate to the library list and search for libcurl. Information on how to add it to CMake will be displayed find_package(CURL) add_executable(project_name main.cpp) target_link_libraries(project_name CURL::libcurl) After reloading the CMake project, you should see Conan installing the libraries in the CMake output with an older version of libcurl it will display: $ conan graph outdated --requires=libcurl/[*] ======== Computing dependency graph ======== Graph root cli Requirements libcurl/8.5.0#95279f20d2443016907657f081a79261

install them from CLion. For example, if you want to use libcurl to download an image from the Internet, navigate to the library list and search for libcurl. Information on how to add it to CMake will be displayed find_package(CURL) add_executable(project_name main.cpp) target_link_libraries(project_name CURL::libcurl) After reloading the CMake project, you should see Conan installing the libraries in the CMake output with an older version of libcurl it will display: $ conan graph outdated --requires=libcurl/[*] ======== Computing dependency graph ======== Graph root cli Requirements libcurl/8.5.0#95279f20d2443016907657f081a79261

transmitted to the caller What about in composition? For example: Function in turn calls POSIX and libcurl functions What should be returned to avoid losing context? 15 std::error_code Combines a “code”

. . . . . . . . 1171 71 Future 1172 72 Interactive Utilities 1173 73 Lazy Artifacts 1181 74 LibCURL 1182 75 LibGit2 1183 76 Dynamic Linker 1224 77 Linear Algebra 1227 77.1 Special matrices . . callback should handle a total size of zero gracefully. If the verbose option is set to true, libcurl, which is used to implement the download functionality will print debugging information to stderr original URL that was requested without any redirects • code: the libcurl error code; 0 if a protocol-only error occurred • message: the libcurl error message indicating what went wrong • response: response

. . . . . . . . 1171 71 Future 1172 72 Interactive Utilities 1173 73 Lazy Artifacts 1181 74 LibCURL 1182 75 LibGit2 1183 76 Dynamic Linker 1224 77 Linear Algebra 1227 77.1 Special matrices . . callback should handle a total size of zero gracefully. If the verbose option is set to true, libcurl, which is used to implement the download functionality will print debugging information to stderr original URL that was requested without any redirects • code: the libcurl error code; 0 if a protocol-only error occurred • message: the libcurl error message indicating what went wrong • response: response