http 请求头的几种Content-type

https://blog.csdn.net/Jesse_cool/article/details/86608816?spm=1001.2101.3001.6650.6&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-6-86608816-blog-126372443.235%5Ev38%5Epc_relevant_default_base&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-6-86608816-blog-126372443.235%5Ev38%5Epc_relevant_default_base&utm_relevant_index=11