# 流程服务调用环节使用

- [服务地址URL动态参数](https://o2oa.gitbook.io/course/liu-cheng-guan-li/liu-cheng-ying-yong-kai-fa-yu-she-ji/liu-cheng-fu-wu-tiao-yong-huan-jie-shi-yong/dong-tai-restful-fu-wu-url-can-shu.md): http://{hostip}:{port}/service.  多数情况下，我们需要在实际运行过程中动态指定流程中需要调用的服务的地址以及其他的URL参数，那么URL的参数化也需要有一个方法来实现，本章主要讲述此功能
- [自定义HTTP头信息](https://o2oa.gitbook.io/course/liu-cheng-guan-li/liu-cheng-ying-yong-kai-fa-yu-she-ji/liu-cheng-fu-wu-tiao-yong-huan-jie-shi-yong/zi-ding-yi-http-tou-xin-xi.md): 在很多时间，调用第三方系统服务的时候，需要指定的HTTPHEADER，需要带一些认证标识，或者其他第三方指定的信息，此时需要在发送请求时对httpHeader进行编辑，此篇上要讲述该功能


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