技术标签: cygwin webrtc 音视频 coturn windows
coTurn是一个开源的STUN和TURN及ICE服务项目,只是不支持Windows。
为了在window平台上使用coTurn源码,需要在windows平台下安装Cygwin环境,并编译coTurn源码,使其可以运行在windows平台上。
步骤:
1、安装Cygwin,地址:https://cygwin.com/install.html,按照其说明进行安装。参照说明地址:https://cygwin.com/cygwin-ug-net/cygwin-ug-net.html
最好选择64位的,我一开始用的32位的,安装gcc总是报错,换到64位就可以了(也许是我机子问题)。
安装过程中选择的镜像源地址,为了更加快速,使用http://mirrors.163.com/cygwin/
这里有几个坑,要注意,不然编译的时候 会报错:
在这个页面,要在del列表下选择四个工具库:
①gcc
②openssl
③libevent
④make(bin和source都要选择)
2、下载coTurn源码。目前Release最新版本的地址为:https://codeload.github.com/coturn/coturn/zip/4.5.0.4
解压后,把coturn-4.5.0.4文件夹放在cygwin的安装路劲C:\cygwin64\bin下。后面就开始编译了。
3、编译:
编译过程:
$ ./configure
install 是 /usr/bin/install
sqlite3 是 /cygdrive/c/Users/Administrator/AppData/Local/Android/Sdk/platform-tools/sqlite3
Use TMP dir /var/tmp
Compiler: cc
Library option -lsocket cannot be used
CYGWIN ?
Library option -lwldap64 cannot be used
Library option -lintl cannot be used
Library option -lnsl cannot be used
Sockets code is fine: no sin_len field present
Ignore IP_RECVERR
Crypto SSL lib found.
SSL lib found.
Libevent2 development found.
Libevent2 runtime found.
Libevent2 runtime 'extra' found.
Libevent2 openssl found.
Libevent2 pthreads found.
Library option -lsqlite3 cannot be used
SQLite3 development library cannot be found.
SQLite DEVELOPMENT LIBRARY (libsqlite3) AND/OR HEADER (sqlite3.h)
ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT SQLITE SUPPORT.
POSTGRESQL DEVELOPMENT LIBRARY (libpq.a) AND/OR HEADER (libpq-fe.h)
ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT POSTGRESQL DATABASE SUPPORT.
MYSQL DEVELOPMENT LIBRARY (libmysqlclient) AND/OR HEADER (mysql.h)
ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT MYSQL DATABASE SUPPORT.
MONGODB DEVELOPMENT LIBRARIES (libmongoc-1.0 and libbson-1.0) AND/OR HEADER (mongoc.h)
ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT MONGODB SUPPORT.
HIREDIS DEVELOPMENT LIBRARY (libhiredis.*) AND/OR HEADERS (hiredis/*.h)
ARE NOT INSTALLED PROPERLY ON THIS SYSTEM.
THAT'S OK BUT THE TURN SERVER IS BUILDING WITHOUT REDIS SUPPORT.
PREFIX=/usr/local LOCALSTATEDIR=/usr/local/var OSLIBS= -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib DBLIBS= OSCFLAGS=-g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb DBCFLAGS=
Makefile created: success.
$ make
mkdir -p build/obj
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ -c src/client/ns_turn_ioaddr.c -o build/obj/ns_turn_ioaddr.o
mkdir -p build/obj
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ -c src/client/ns_turn_msg_addr.c -o build/obj/ns_turn_msg_addr.o
mkdir -p build/obj
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ -c src/client/ns_turn_msg.c -o build/obj/ns_turn_msg.o
mkdir -p lib
ar -r lib/libturnclient.a build/obj/ns_turn_ioaddr.o build/obj/ns_turn_msg_addr.o build/obj/ns_turn_msg.o
ar: 正在创建 lib/libturnclient.a
pwd
/cygdrive/e/workspace/webrtc/coturn-master
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/oauth/oauth.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_oauth -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
pwd
/cygdrive/e/workspace/webrtc/coturn-master
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/natdiscovery/natdiscovery.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_natdiscovery -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
pwd
/cygdrive/e/workspace/webrtc/coturn-master
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/stunclient/stunclient.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_stunclient -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
pwd
/cygdrive/e/workspace/webrtc/coturn-master
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/rfc5769/rfc5769check.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_rfc5769check -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/uclient/uclient.c src/apps/uclient/startuclient.c src/apps/uclient/mainuclient.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_uclient -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
mkdir -p bin
rm -rf bin/turnadmin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ -DTURN_NO_PQ -DTURN_NO_MYSQL -DTURN_NO_SQLITE -DTURN_NO_MONGO -DTURN_NO_HIREDIS src/apps/relay/ns_ioalib_engine_impl.c src/apps/relay/turn_ports.c src/apps/relay/http_server.c -Ilib src/apps/relay/mainrelay.c src/apps/relay/netengine.c src/apps/relay/libtelnet.c src/apps/relay/turn_admin_server.c src/apps/relay/userdb.c src/apps/relay/tls_listener.c src/apps/relay/dtls_listener.c src/apps/common/hiredis_libevent2.c src/apps/relay/dbdrivers/dbdriver.c src/apps/relay/dbdrivers/dbd_sqlite.c src/apps/relay/dbdrivers/dbd_pgsql.c src/apps/relay/dbdrivers/dbd_mysql.c src/apps/relay/dbdrivers/dbd_mongo.c src/apps/relay/dbdrivers/dbd_redis.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c src/client/ns_turn_ioaddr.c src/client/ns_turn_msg_addr.c src/client/ns_turn_msg.c src/server/ns_turn_allocation.c src/server/ns_turn_maps_rtcp.c src/server/ns_turn_maps.c src/server/ns_turn_server.c -o bin/turnserver -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
cd bin; ln -s turnserver turnadmin
mkdir -p bin
cc -g -Wall -Wno-deprecated-declarations -Wextra -Wformat-security -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -I/usr/local/include -I/usr/local/include/ -I/usr/local/include -DTURN_HAS_DAEMON -DINSTALL_PREFIX=/usr/local -DTURNDB=/usr/local/var/db/turndb -Isrc -Isrc/apps/common -Isrc/server -Isrc/client -Isrc/client++ -I/usr/local/include/ -I/usr/local/include/ src/apps/peer/mainudpserver.c src/apps/peer/udpserver.c src/apps/common/apputils.c src/apps/common/ns_turn_utils.c src/apps/common/stun_buffer.c -o bin/turnutils_peer -Llib -lturnclient -Llib -L/usr/local/lib/ -L/usr/local/lib/ -lrt -lwldap32 -lresolv -lcrypto -lssl -levent_core -levent_extra -levent_openssl -levent_pthreads -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib/ -Wl,-rpath,/usr/local/lib
rm -rf include
mkdir -p include/turn/client
cp -pf src/client/*.h include/turn/client/
cp -pf src/client++/*.h include/turn/client/
cp -pf src/ns_turn_defs.h include/turn/
install -d sqlite
rm -rf sqlite/turndb
sqlite3 sqlite/turndb < turndb/schema.sql
$ make install
install -d /usr/local
install -d /usr/local/bin
install -d /usr/local/var/db
install -d /usr/local/man/man1
install -d /usr/local/etc
install -d /usr/local/lib
install -d /usr/local/share/examples/turnserver
install -d /usr/local/share/doc/turnserver
install -d /usr/local/share/turnserver
install -d /usr/local/include/turn
install bin/turnserver /usr/local/bin
install bin/turnadmin /usr/local/bin
install bin/turnutils_uclient /usr/local/bin
install bin/turnutils_peer /usr/local/bin
install bin/turnutils_stunclient /usr/local/bin
install bin/turnutils_oauth /usr/local/bin
install bin/turnutils_natdiscovery /usr/local/bin
install man/man1/turnserver.1 /usr/local/man/man1/
install man/man1/turnadmin.1 /usr/local/man/man1/
install man/man1/turnutils.1 /usr/local/man/man1/
install man/man1/turnutils_uclient.1 /usr/local/man/man1/
install man/man1/turnutils_stunclient.1 /usr/local/man/man1/
install man/man1/turnutils_oauth.1 /usr/local/man/man1/
install man/man1/turnutils_natdiscovery.1 /usr/local/man/man1/
install man/man1/turnutils_peer.1 /usr/local/man/man1/
install man/man1/coturn.1 /usr/local/man/man1/
install lib/libturnclient.a /usr/local/lib
install LICENSE /usr/local/share/doc/turnserver
install README.turnserver /usr/local/share/doc/turnserver
install README.turnadmin /usr/local/share/doc/turnserver
install README.turnutils /usr/local/share/doc/turnserver
install INSTALL /usr/local/share/doc/turnserver
install postinstall.txt /usr/local/share/doc/turnserver
install turndb/schema.sql /usr/local/share/doc/turnserver
install turndb/schema.sql /usr/local/share/turnserver
install turndb/schema.mongo.sh /usr/local/share/doc/turnserver
install turndb/schema.mongo.sh /usr/local/share/turnserver
install turndb/testredisdbsetup.sh /usr/local/share/turnserver
install turndb/testmongosetup.sh /usr/local/share/turnserver
install turndb/testsqldbsetup.sql /usr/local/share/turnserver
install turndb/schema.userdb.redis /usr/local/share/doc/turnserver
install turndb/schema.userdb.redis /usr/local/share/turnserver
install turndb/schema.stats.redis /usr/local/share/doc/turnserver
install turndb/schema.stats.redis /usr/local/share/turnserver
if [ -f sqlite/turndb ] ; then install sqlite/turndb /usr/local/var/db/turndb; fi
install examples/etc/turnserver.conf /usr/local/etc/turnserver.conf.default
cp -rpf examples/etc /usr/local/share/examples/turnserver
cp -rpf examples/scripts /usr/local/share/examples/turnserver
rm -rf /usr/local/share/examples/turnserver/scripts/rfc5769.sh
cp -rpf include/turn/client /usr/local/include/turn
install include/turn/ns_turn_defs.h /usr/local/include/turn
cat /usr/local/share/doc/turnserver/postinstall.txt
==================================================================
1) If your system supports automatic start-up system daemon services,
then to enable the turnserver as a system service that is automatically
started, you have to:
a) Create and edit /etc/turnserver.conf or
/usr/local/etc/turnserver.conf .
Use /usr/local/etc/turnserver.conf.default as an example.
b) For user accounts settings: set up SQLite or PostgreSQL or
MySQL or MongoDB or Redis database for user accounts.
Use /usr/local/share/turnserver/schema.sql as SQL database schema,
or use /usr/local/share/turnserver/schema.userdb.redis as Redis
database schema description and/or
/usr/local/share/turnserver/schema.stats.redis
as Redis status & statistics database schema description.
If you are using SQLite, the default database location is in
/var/db/turndb or in /usr/local/var/db/turndb or in /var/lib/turn/turndb.
c) add whatever is necessary to enable start-up daemon for the
/usr/local/bin/turnserver.
2) If you do not want the turnserver to be a system service,
then you can start/stop it "manually", using the "turnserver"
executable with appropriate options (see the documentation).
3) To create database schema, use schema in file
/usr/local/share/turnserver/schema.sql.
4) For additional information, run:
$ man turnserver
$ man turnadmin
$ man turnutils
==================================================================
4、配置
在bin目录下生成六个可执行文件
turnadmin turnutils_peer.exe turnutils_stunclient.exe turnserver.exe turnutils_rfc5769check.exe turnutils_uclient.exe
turnserver.exe 就是我们需要的服务器.
turnadmin 用来管理账户.
turnutils_stunclient.exe 用于测试stun服务
turnutils_uclient.exe 用于测试turn服务. 模拟多个UDP,TCP,TLS or DTLS 类型的客户端
example 目录主要是示范如何配置和使用turn. 包含一些测试用例.
example/etc 下是pem证书和conf配置文件
example/var/db 下是sqlite的db库. 用于示范数据库的格式.
coturn 支持三种配置. 命令行, conf文件和数据库.
数据库支持sqlite, mysql, postgresql, MongoDB, redis.目前测试的Cygwin环境下编译的coTurn不支持MongoDB和redis,因为暂时用不到,所以也就没有查找如何才能编译支持到上述数据库
更具体的说明可以看源码目录下的README.turnserver README.turnadmin README.turnutils
examples\scripts 下一些测试用例:
loadbalance 示范如何进行负载均衡. 设置一个master turn server 然后配置若干个slave turn server.
longtermsecure 示范如何使用long-term 验证
longtermsecuredb 与 longtermsecure 类似, 不过是从数据库配置
shorttermsecure 示范如何使用short-term验证.
restapi 示范了web方面的使用.
stun 定义了两种验证方式.
Long-Term Credential
具体可以参考stun标准 http://tools.ietf.org/html/rfc5389#section-15.4
若用于WebRTC,必须使用long-term
简单配置:
turnserver -o -a -f -v --mobility -m 10 --max-bps=100000 --min-port=32355 --max-port=65535 --user=webrtc0
:webrtc
1234 --user=webrtc1
:webrtc
1234 -r demo
-m 10 表示启动十个relay线程.
当TURN Server用于WebRTC时,必须使用long-term credential mechanism, 即指定 -a 或者 --lt-cred-mech
--max-bps=100000 限制最大速度为100KB/s.
添加了两个用户webrtc0
和webrtc1
.
可以直接使用turnutils_uclient -u ling -w webrtc
1234 来测试. turnutils_uclient 有很多参数可以配置的.
1 2 3 4 5 |
|
下面的配置文件和上面的配置命令是两种方式,在实际应用中只能用一种。
在这里要注意,在bin路径下,建配置文件turnserver.conf,内容为:
listening-ip=192.168.1.113//这是个公网ip
listening-port=3478
#relay-ip=0.0.0.0
external-ip=0.0.0.0
min-port=59000
max-port=65000
Verbose
fingerprint
no-stdout-log
syslog
cert=pem/turn_server_cert.pem
pkey=pem/turn_server_pkey.pem
user=demo:demo
no-tcp
no-tls
no-tcp-relay
stun-only
#secure-stun
如果用的是阿里云服务器,要开放3478端口,tcp、udp都打开。
这里turnserver就开启成功了,测试可以用https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/ 来测试服务器是否成功。
Short-Term Credential
参考链接:
文章浏览阅读529次。百分百题库提供建筑八大员(材料员)考试试题、建筑八大员(材料员)考试预测题、建筑八大员(材料员)考试真题、建筑八大员(材料员)证考试题库等,提供在线做题刷题,在线模拟考试,助你考试轻松过关。310项目经理部应编制机械设备使用计划并报()审批。A监理单位B企业C建设单位D租赁单位答案:B311对技术开发、新技术和新工艺应用等情况进行的分析和评价属于()。A人力资源管理考核B材料管理考核C机械设备管理考核D技术管理考核答案:D312建筑垃圾和渣土._料账的试题
文章浏览阅读614次。本文由chatgpt生成,文章没有在chatgpt生成的基础上进行任何的修改。以上只是chatgpt能力的冰山一角。作为通用的Aigc大模型,只是展现它原本的实力。对于颠覆工作方式的ChatGPT,应该选择拥抱而不是抗拒,未来属于“会用”AI的人。AI职场汇报智能办公文案写作效率提升教程 专注于AI+职场+办公方向。下图是课程的整体大纲下图是AI职场汇报智能办公文案写作效率提升教程中用到的ai工具。_python自动打开浏览器
文章浏览阅读545次。Linux中安装JDK-RPM方式_linux 安装jdk rpm
文章浏览阅读25次。免费领取项目源码,请关注赞收藏并私信博主,谢谢-高校志愿者管理系统主要功能模块包括页、个人资料(个人信息。修改密码)、公共管理(轮播图、系统公告)、用户管理(管理员、志愿用户)、信息管理(志愿资讯、资讯分类)、活动分类、志愿活动、报名信息、活动心得、留言反馈,采取面对对象的开发模式进行软件的开发和硬体的架设,能很好的满足实际使用的需求,完善了对应的软体架设以及程序编码的工作,采取SQL Server 作为后台数据的主要存储单元,采用Asp.Net技术进行业务系统的编码及其开发,实现了本系统的全部功能。
文章浏览阅读122次。原标题:小米OV对于是否采用鸿蒙保持沉默,原因是中国制造需要它们目前华为已开始对鸿蒙系统大规模宣传,不过中国手机四强中的另外三家小米、OPPO、vivo对于是否采用鸿蒙系统保持沉默,甚至OPPO还因此而闹出了一些风波,对此柏铭科技认为这是因为中国制造当下需要小米OV几家继续将手机出口至海外市场。 2020年中国制造支持中国经济渡过了艰难的一年,这一年中国进出口贸易额保持稳步增长的势头,成为全球唯一..._小米宣布用鸿蒙系统
文章浏览阅读1.3k次。1.Kafka Eagle实现kafka消息监控的代码细节是什么?2.Kafka owner的组成规则是什么?3.怎样使用SQL进行kafka数据预览?4.Kafka Eagle是否支持多集群监控?1.概述在《Kafka 消息监控 - Kafka Eagle》一文中,简单的介绍了 Kafka Eagle这款监控工具的作用,截图预览,以及使用详情。今天_kafka eagle git
文章浏览阅读1.1k次,点赞29次,收藏19次。Eva.js 是一个专注于开发互动游戏项目的前端游戏引擎。:Eva.js 提供开箱即用的游戏组件供开发人员立即使用。是的,它简单而优雅!:Eva.js 由高效的运行时和渲染管道 (Pixi.JS) 提供支持,这使得释放设备的全部潜力成为可能。:得益于 ECS(实体-组件-系统)架构,你可以通过高度可定制的 API 扩展您的需求。唯一的限制是你的想象力!_eva.js
文章浏览阅读1k次。Objective-C概述Objective-C是一种面向对象的计算机语言,1980年代初布莱德.考斯特在其公司Stepstone发明Objective-C,该语言是基于SmallTalk-80。1988年NeXT公司发布了OC,他的开发环境和类库叫NEXTSTEP, 1994年NExt与Sun公司发布了标准的NEXTSTEP系统,取名openStep。1996_objective-c特点及应用领域
文章浏览阅读955次,点赞20次,收藏16次。TIM(Timer)定时器定时器可以对输入的时钟进行计数,并在计数值达到设定值时触发中断16位计数器、预分频器、自动重装寄存器的时基单元,在 72MHz 计数时钟下可以实现最大 59.65s 的定时,59.65s65536×65536×172MHz59.65s65536×65536×721MHz不仅具备基本的定时中断功能,而且还包含内外时钟源选择、输入捕获、输出比较、编码器接口、主从触发模式等多种功能。_stm32 tim寄存器详解
文章浏览阅读1.5k次。对于任何有兴趣学习前端 Web 开发的人来说,了解 HTML、CSS 和JavaScript 之间的区别至关重要。这三种前端语言都是您访问过的每个网站的用户界面构建块。而且,虽然每种语言都有不同的功能重点,但它们都可以共同创建令人兴奋的交互式网站,让用户保持参与。因此,您会发现学习所有三种语言都很重要。如果您有兴趣从事前端开发工作,可以通过多种方式学习这些语言——在艾编程就可以参与到学习当中来。在本文中,我们将回顾每种语言的特征、它们如何协同工作以及您可以在哪里学习它们。HTML vs C._艾编程学习资料
文章浏览阅读2.8k次。点云配准主要针对点云的:不完整、旋转错位、平移错位。因此要得到完整点云就需要对局部点云进行配准。为了得到被测物体的完整数据模型,需要确定一个合适的坐标系变换,将从各个视角得到的点集合并到一个统一的坐标系下形成一个完整的数据点云,然后就可以方便地进行可视化,这就是点云数据的配准。点云配准技术通过计算机技术和统计学规律,通过计算机计算两个点云之间的错位,也就是把在不同的坐标系下的得到的点云进行坐标变..._局部点云与全局点云配准
文章浏览阅读273次。提取码:0oorGoogle和YouTube由于Python的高可适应性、易于维护以及适合于快速开发而采用它。如果你想要编写高质量、高效的并且易于与其他语言和工具集成的代码,《Python学习手册:第4 版》将帮助你使用Python快速实现这一点,不管你是编程新手还是Python初学者。本书是易于掌握和自学的教程,根据作者Python专家Mark Lutz的著名培训课程编写而成。《Python学习..._零基础学pythonpdf电子书